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djDAWG has Authored 118 Questions  | A. Ununobium B. Ununobarium C. Ununoctium D. Unuodoxium From the periodic table, the symbol Uuo stands for Ununoctium. Ununoctiuma, also known as eka-radon or element 118, is the temporary name for the transactinide element having the atomic number 118. |
| A. Ununsagmium B. Ununseptium C. Ununserium D. Ununsonium From the periodic table, the symbol Uus stands for Ununseptium. Ununseptiumis a temporary name for atomic number 117. |
| A. Ununhagmium B. Ununhalfmium C. Ununharium D. Ununhexium From the periodic table, the symbol Uuh stands for Ununhexium. Ununhexium is a temporary name for atomic number 116. |
| A. Ununpentium B. Ununapentium C. Unuaparium D. Unuapalium From the periodic table, the symbol Uup stands for Ununpentium. Ununpentium is a temporary name for atomic number 115. |
| A. Unquakium B. Ununquadium C. Ununqualium D. Ununquartium From the periodic table, the symbol Uuq stands for Ununquadium. Ununquadium is a temporary name for atomic number 114. |
| A. Unutalium B. Unutarium C. Ununtrium D. Unutogrium From the periodic table, the symbol Uut stands for Ununtrium. Ununtriumis a temporary name for atomic number 113. Element 113 has been synthesized both directly in cold and warm fusion reactions. It was first observed in the decay of ununpentium. Only eight atoms of ununtrium have been observed to date. |
| A. Ununbarium B. Ununbium C. Unbornium D. Unbaggium From the periodic table, the symbol Uub stands for Ununbium. Ununbium is a temporary name for atomic number 112. Element 112 is one of the superheavy elements. |
| A. Normium B. Nominium C. Nochtorium D. Nobelium From the periodic table, the symbol No stands for Nobelium. Nobelium is a radioactive rare earth metal named after Alfred Nobel who discovered dynamite. |
| A. Madnormium B. Mendelevium C. Modgromium D. Mondorium From the periodic table, the symbol Md stands for Mendelevium. Mendelevium is a radioactive rare earth metal named after Dmitri Mendeleev, father of the Periodic Table. |
| A. Famorium B. Femorium C. Fermium D. Fomontium From the periodic table, the symbol Fm stands for Fermium. Fermium's chemical properties are largely unknown. Fermium is a radioactive rare earth metal. The longest living isotope is is 257Fm with a half-life of 80 days. It is of no commercial importance. |
| A. Esparium B. Einsteinium C. Espallium D. Escantium From the periodic table, the symbol Es stands for Einsteinium. Einsteinium is radioactive rare earth metal named after Albert Einstein. It is of no commercial importance and only a few of its compounds are known. |
| A. Californium B. Calgarium C. Calfintium D. Coffinium From the periodic table, the symbol Cf stands for Californium. Californium is a radioactive rare earth metal named after the state of California and the University of California (USA). Californium-252 is a strong neutron emitter and one micro gram emits 170 million neutrons per minute, making it a biological hazard. It has a few specialized uses but only a few of its compounds are known. |
| A. Bankorium B. Balkantium C. Berkelium D. Blackhorium From the periodic table, the symbol Bk stands for Berkelium. Berkelium is a radioactive rare earth metal, named after the University of California at Berkeley (USA). Berkelium tends to accumulate in the skeletal system. It is of no commercial importance and only a few of its compounds are known. |
| A. Cadmium B. Cesium C. Cerium D. Curium From the periodic table, the symbol Cm stands for Curium. Curium is a hard, brittle, radioactive silvery metal. It does not occur in nature and must be made in a nuclear reactor by neutron capture reactions from plutonium and americium isotopes. It tarnishes slowly in dry air at room temperature. |
| A. Americium B. Amoctium C. Amorium D. Ammonium From the periodic table, the symbol Am stands for Americium. The luster of freshly prepared americium metal is whiter and more silvery than plutonium or neptunium prepared in the same manner. |
| A. Puntinium B. Pugaylium C. Punkassium D. Plutonium From the periodic table, the symbol Pu stands for Plutonium. Plutonium was the second transuranium element of the actinide series to be discovered. By far of greatest importance is the isotope 239Pu, which has a half-life of more than 20000 years. One kilogram is equivalent to about 22 million kilowatt hours of heat energy. The complete detonation of a kilogram of plutonium produces an explosion equal to about 20000 tons of chemical explosive. |
| A. Napium B. Neptunium C. Noptanium D. Norgranium From the periodic table, the symbol Np stands for Neptunium. Neptunium is a radioactive rare earth metal and has at least 3 allotropic forms. |
| A. Ununhexium B. Ununoctium C. Ununtirum D. Uranium From the periodic table, the symbol U stands for Uranium. Uranium is of great interest because of its application to nuclear power and nuclear weapons. Uranium contamination is an emotive environmental problem. |
| A. Protactinium B. Palladium C. Platinum D. Praseodymium From the periodic table, the symbol Pa stands for Protactinium. Protactinium has a bright metallic luster which it retains for some time in air. The element is superconductive below 1.4 K. The element is a dangerous toxic material and requires precautions similar to those used when handling plutonium. |
| A. Thallium B. Thantorium C. Thorium D. Thongium From the periodic table, the symbol Th stands for Thorium. Thorium is a source of nuclear power. There is probably more untapped energy available for use from thorium in the minerals of the earth's crust than from combined uranium and fossil fuel sources. Much of the internal heat the earth has been attributed to thorium and uranium. When pure, thorium is a silvery white metal which is air-stable and retains its luster for several months. When contaminated with the oxide, thorium slowly tarnishes in air, becoming gray and finally black. |
| A. Accordium B. Actinium C. Accnorium D. Acantium From the periodic table, the symbol Ac stands for Actinium. Actinium is dangerously radioactive. The chemical behavior of actinium is similar to that of the rare earths, particularly lanthanum. It is found naturally in uranium ores and actinium is 150 times more radioactive than radium. |
| A. Yogiberium B. Youbungium C. Yttrium D. Ytterbium From the periodic table, the symbol Yb stands for Ytterbium. Ytterbium has a bright silvery luster, is soft, malleable, and quite ductile. While the element is fairly stable, it should be kept in closed containers to protect it from air and moisture. Ytterbium is readily attacked and dissolved by mineral acids and reacts slowly with water. |
| A. Tantalum B. Technetium C. Thulium D. Thorium From the periodic table, the symbol Tm stands for Thulium. Thulium is the least abundant of the earth elements, and is about as rare as silver, gold, or cadmium. The pure metal has a bright, silvery luster. It is reasonably stable in air, but the metal must be protected from moisture. The element is silvery-gray, soft, malleable, and ductile, and can be cut with a knife. |
| A. Europium B. Erbium C. Ernarium D. Ergranium From the periodic table, the symbol Er stands for Erbium. Pure erbium metal is soft and malleable and has a bright, silvery, metallic luster. As with other rare-earth metals, its properties depend to a certain extent on impurities present. The metal is fairly stable in air and does not oxidize as rapidly as some of the other rare-earth metals. |
| A. Holmium B. Hominium C. Hogrodium D. Hobroodium From the periodic table, the symbol Ho stands for Holmium. Holmium is relatively soft and malleable, and is stable in dry air at room temperature. It oxidizes rapidly in moist air and at elevated temperatures. The metal has unusual magnetic properties. The metal is a rare earth metal found in monazite, gadolinite and other minerals. |
| A. Dyranium B. Dyradium C. Dyporium D. Dysprosium From the periodic table, the symbol Dy stands for Dysprosium. Dysprosium has a metallic, bright silver luster. It is relatively stable in air at room temperature, but dissolves readily, with the evolution of hydrogen, in mineral acids. The metal is soft enough to be cut with a knife and can be machined without sparking if overheating is avoided. It is a rare earth metal found in minerals such as xenotime, monazite and bastnaesite. |
| A. Tabinium B. Taginium C. Terbium D. Torbindium From the periodic table, the symbol Tb stands for Terbium. Terbium is reasonably stable in air. It is a silvery-grey metal, and is malleable, ductile, and soft enough to be cut with a knife. It is a rare earth metal found in cerite, gadolinite and monazite. |
| A. Gadolinium B. Gold C. Godonium D. Iron From the periodic table, the symbol Gd stands for Gadolinium. Gadolinium is silvery white, has a metallic luster, and is is malleable and ductile. It is ferromagnetic (strongly attracted by a magnet). The metal is relatively stable in dry air, but in moist air it tarnishes with the formation of a loosely adhering oxide film which spalls off and exposes more surface to oxidation. The metal reacts slowly with water and is soluble in dilute acid. Gadolinium has the highest thermal neutron capture cross-section of any known element. |
| A. Egrumium B. Eronium C. Europium D. Egalium From the periodic table, the symbol Eu stands for Europium. Europium about as hard as lead and is quite ductile. It is the most reactive of the rare earth metals, quickly oxidizing in air. It resembles calcium in its reaction with water. |
| A. Sadmanium B. Samarium C. Swamarium D. Swordanium From the periodic table, the symbol Sm stands for Samarium. Samarium has a bright silver luster and is reasonably stable in air. It ignites in air at 150°C. It is a rare earth metal. |
| A. Pamdonium B. Promethium C. Prumagnium D. Plomanium From the periodic table, the symbol Pm stands for Promethium. Little is yet generally known about the properties of metallic promethium. More than 30 promethium compounds have been prepared. Promethium is a rare earth metal. It appears that there is no known Pm existing in the earth's crust. |
| A. Nadinium B. Napindium C. Nendonium D. Neodymium From the periodic table, the symbol Nd stands for Neodymium. Neodymium has a bright silvery metallic luster. Neodymium is one of the more reactive rare-earth metals and quickly tarnishes in air, forming an oxide that spalls off and exposes the metal to further oxidation. It is one of the rare earth metals. |
| A. Practolium B. Praseodymium C. Promethium D. Protactinium From the periodic table, the symbol Pr stands for Praseodymium. Praseodymium is soft, silvery, malleable, and ductile. It is somewhat more resistant to corrosion in air than europium, lanthanum, cerium, or neodymium, but it does develop a green oxide coating that spalls away when exposed to air. |
| A. Caesium B. Cerium C. Celelium D. Cellerium From the periodic table, the symbol Ce stands for Cerium. Cerium is an iron-grey lustrous metal. It is malleable, and oxidizes very readily at room temperature, especially in moist air. Except for europium, cerium is the most reactive of the rare-earth metals. It slowly decomposes in cold water, and rapidly in hot water. Alkali solutions and dilute and concentrated acids attack the metal rapidly. The pure metal may ignite when scratched with a knife. |
| A. Ladanium B. Lagainium C. Lanthanum D. Lawrencium From the periodic table, the symbol La stands for Lanthanum. Lanthanum is silvery white, malleable, ductile, and soft enough to be cut with a knife. It is one of the most reactive of the rare-earth metals. It oxidizes rapidly when exposed to air. Cold water attacks lanthanum slowly, and hot water attacks it much more rapidly. The metal reacts directly with elemental carbon, nitrogen, boron, selenium, silicon, phosphorus, sulfur, and with halogens. |
| A. Ragnium B. Regalium C. Rogolium D. Roentgenium From the periodic table, the symbol Rg stands for Roentgenium. Chemically, roentgenium should be in the same group as the elements copper, silver, and gold (Group 11). |
| A. Darmstadtium B. Desentrium C. Desilium D. Dysprosium From the periodic table, the symbol Ds stands for Darmstadtium. Darmstadtium is a synthetic element that is not present in the environment at all. Chemically, darmstadtium is in the same Group as nickel, palladium, and platinum (Group 10). Unlike these lighter atoms, darmstadtium decays after a small fraction of a thousandth of a second into lighter elements by emitting α-particles which are the nuclei of helium atoms. |
| A. Mantarium B. Maturium C. Meitnerium D. Mintorium From the periodic table, the symbol Mt stands for Meitnerium. Meitnerium is a synthetic element that is not present in the environment at all. |
| A. Hassium B. Horsium C. Holsonium D. Hordsonium From the periodic table, the symbol HS stands for Hassium. Hassium is a synthetic element that is not present in the environment at all. |
| A. Barhium B. Berkelium C. Bahronium D. Bohrium From the periodic table, the symbol Bh stands for Bohrium. Bohrium is a synthetic element that is not present in the environment at all. |
| A. Sagorium B. Santagagorium C. Seaborgium D. Seadoodium From the periodic table, the symbol Sg stands for Seaborgium. Seaborgium is a synthetic element that is not present in the environment at all. It has no uses. |
| A. Danbanium B. Dubnium C. Dynambium D. Dairynumbdididum From the periodic table, the symbol Db stands for Dubnium. Dubnium is a synthetic element that is not present in the environment at all. It has no uses. |
| A. Praseodymium B. Roentgenium C. Rutherfordium D. Slenium From the periodic table, the symbol Rf stands for Rutherfordium. Rutherfordium is a synthetic element that is not present in the environment at all. It has no uses. |
| A. Lawrencium B. lutetium C. Lutherisium D. Lancerium From the periodic table, the symbol Lr stands for Lawrencium. Lawrencium is a synthetic rare earth metal which does not occur in the environment. |
| A. Rabium B. Radium C. Radon D. Rhodium From the periodic table, the symbol Ra stands for Radium. Pure metallic radium is brilliant white when freshly prepared, but blackens on exposure to air, probably due to formation of the nitride. It exhibits luminescence, as do its salts. It decomposes in water and is somewhat more volatile than barium. |
| A. Fermium B. Fromine C. Francium D. Falconium From the periodic table, the symbol Fr stands for Francium. Francium occurs as a result of α disintegration of actinium. Francium is found in uranium minerals, and can be made artificially by bombarding thorium with protons. It is the most unstable of the first 101 elements. |
| A. Radon B. Rhenium C. Ruthenium D. Silicon From the periodic table, the symbol Rn stands for Radon. At ordinary temperatures radon is a colorless gas. When cooled below the freezing point, radon exhibits a brilliant phosphorescence which becomes yellow as the temperature is lowered and orange-red at the temperature of liquid air. |
| A. Actinium B. Antimony C. Arsenic D. Astatine From the periodic table, the symbol At stands for Astatine. Astatine is a highly radioactive element has been confirmed by mass spectrometers to behave chemically much like other halogens, especially iodine, though astatine is thought to be more metallic than iodine. |
| A. Phosphorus B. Potassium C. Polonium D. Promethium From the periodic table, the symbol Po stands for Polonium. Polonium has more isotopes than any other element, all of which are radioactive. Polonium dissolves readily in dilute acids, but is only slightly soluble in alkalis. |
| A. Biarium B. Bismuth C. Boron D. Bromine From the periodic table, the symbol Bi stands for Bismuth. bismuth is a white, crystalline, brittle metal with a pinkish tinge. Bismuth is the most diamagnetic of all metals, and the thermal conductivity is lower than any metal, except mercury. It has a high electrical resistance, and has the highest Hall effect of any metal (that is, the greatest increase in electrical resistance when placed in a magnetic field). |
| A. Palladium B. Pulbunium C. Polonium D. Lead From the periodic table, the symbol Pb stands for Lead. Lead is a bluish-white lustrous metal. It is very soft, highly malleable, ductile, and a relatively poor conductor of electricity. It is very resistant to corrosion but tarnishes upon exposure to air. Lead pipes bearing the insignia of Roman emperors, used as drains from the baths, are still in service. |
| A. Tantalum B. Tellurium C. Thallium D. Thulium From the periodic table, the symbol Ti stands for Thallium. When freshly exposed to air, thallium exhibits a metallic luster, but soon develops a bluish-gray tinge, resembling lead in appearance. A heavy oxide builds up on thallium if left in air, and in the presence of water the hydroxide is formed. The metal is very soft and malleable. It can be cut with a knife. |
| A. Hydrogen B. Mercury C. Lead D. Holmium From the periodic table, the symbol Hg stands for Mercury. Mercury is the only common metal liquid at ordinary temperatures. Mercury is sometimes called quicksilver. It rarely occurs free in nature. It is a heavy, silvery-white liquid metal. It is a rather poor conductor of heat as compared with other metals but is a fair conductor of electricity. It alloys easily with many metals, such as gold, silver, and tin. These alloys are called amalgams. Its ease in amalgamating with gold is made use of in the recovery of gold from its ores. |
| A. Aluminum B. Ammonium C. Actinium D. Gold From the periodic table, the symbol Au stands for Gold. Gold is usually alloyed in jewelery to give it more strength, and the term carat describes the amount of gold present (24 carats is pure gold). It is estimated that all the gold in the world, so far refined, could be placed in a single cube 60 ft. on a side. It is metallic, with a yellow color when in a mass, but when finely divided it may be black, ruby, or purple. |
| A. Plutonium B. Platinum C. Polonium D. Propeltium From the periodic table, the symbol Pt stands for Platinum. Platinum is a beautiful silvery-white metal, when pure, and is malleable and ductile. It has a coefficient of expansion almost equal to that of soda-lime-silica glass, and is therefore used to make sealed electrodes in glass systems. The metal does not oxidize in air. |
| A. Indium B. Iodine C. Iron D. Iridium From the periodic table, the symbol Ir stands for Iridium. Iridium is white, similar to platinum, but with a slight yellowish cast. It is very hard and brittle, making it very hard to machine, form, or work. It is the most corrosion resistant metal known. |
| A. Osmium B. Ostorium C. Oslinkium D. Osankium From the periodic table, the symbol Os stands for Osmium. Osmium metal is lustrous, bluish white, extremely hard, and brittle even at high temperatures. It has the highest melting point and lowest vapor pressure of the platinum group. The metal is very difficult to fabricate, but the powder can be sintered in a hydrogen atmosphere at a temperature of 2000°C. The solid metal is not affected by air at room temperature, but the powdered or spongy metal slowly gives off osmium tetroxide, which is a powerful oxidizing agent and has a strong smell. |
| A. Ruthenium B. Rearendium C. Rhenium D. Relageum From the periodic table, the symbol Re stands for Rhenium. Rhenium is silvery white with a metallic luster. Its density is exceeded only by that of platinum, iridium, and osmium, and its melting point is exceeded only by that of tungsten and carbon. |
| A. Wattium B. Wangchungstium C. Walium D. Tungsten From the periodic table, the symbol W stands for Tungsten. Pure tungsten is a steel-gray to tin-white metal. Tungsten has the highest melting point and lowest vapor pressure of all metals, and at temperatures over 1650°C has the highest tensile strength. The metal oxidizes in air and must be protected at elevated temperatures. It has excellent corrosion resistance and is attacked only slightly by most mineral acids. |
| A. Titanium B. Tantalum C. Thallium D. Tacktanium From the periodic table, the symbol Ta stands for Tantalum. Tantalum is a grayish silver, heavy, and very hard metal. When pure, it is ductile and can be drawn into fine wire, which can be used as a filament for evaporating metals such as aluminum. Tantalum is almost completely immune to chemical attack at temperatures below 150°C, and is attacked only by hydrofluoric acid, acidic solutions containing the fluoride ion, and free sulfur trioxide. The element has a melting point exceeded only by tungsten and rhenium. |
| A. Hafnium B. Hefnium C. Handafnium D. Hassium From the periodic table, the symbol Hf stands for Hafnium. Hafnium is a ductile metal with a brilliant silver luster. Its properties are influenced considerably by the impurities of zirconium present. Of all the elements, zirconium and hafnium are two of the most difficult to separate. |
| A. Lithium B. Lunium C. Lutetium D. Lawrencium From the periodic table, the symbol Lu stands for Lutetium. Lutetium is silvery white and relatively stable in air. It is a rare earth metal and perhaps the most expensive of all rare elements. It is found in small amounts with all rare earth metals, and is very difficult to separate from other rare elements. |
| A. Barium B. Ballsium C. Batmium D. Lead From the periodic table, the symbol Ba stands for Barium. Barium is a metallic element, soft, and when pure is silvery white like lead. The metal oxidizes very easily and it reacts with water or alcohol. Barium is one of the alkaline-earth metals. |
| A. Casium B. Carium C. Cerium D. Cesium From the periodic table, the symbol Cs stands for Cesium or Caesium. Cesium is characterized by a spectrum containing two bright lines in the blue (accounting for its name). It is silvery gold, soft, and ductile. It is the most electropositive and most alkaline element. Cesium, gallium, and mercury are the only three metals that are liquid at or around room temperature. Cesium reacts explosively with cold water, and reacts with ice at temperatures above -116°C. |
| A. Xentium B. Xenon C. Xenium D. Xelium From the periodic table, the symbol Xe stands for Xenon. Xenon is a noble or inert gas present in the atmosphere to a small extent. It is an odorless, colorless, inert gas. |
| A. Iridium B. Iodine C. Iron D. Lead From the periodic table, the symbol I stands for Iodine. Iodine is a bluish-black, lustrous solid. It volatilizes at ambient temperatures into a pretty blue-violet gas with an irritating odor. |
| A. Tantalum B. Technetium C. Thallium D. Tellurium From the periodic table, the symbol Te stands for Tellurium. Crystalline tellurium has a silvery-white appearance, and exhibits a metallic luster when pure. It is brittle and easily pulverized. Tellurium is a p-type semiconductor, and shows varying conductivity with crystal alignment. Its conductivity increases slightly with exposure to light. |
| A. Antimony B. Silver C. Sodium D. Strontium From the periodic table, the symbol Sb stands for Antimony. Metallic antimony is an extremely brittle metal of a flaky, crystalline texture. It is bluish white and has a metallic luster. It is not acted on by air at room temperature, but burns brilliantly when heated with the formation of white fumes. It is a poor conductor of heat and electricity. |
| A. Samarium B. Selenium C. Silicon D. Tin From the periodic table, the symbol Sn stands for Tin. Ordinary tin is a silvery-white metal, is malleable, somewhat ductile, and has a highly crystalline structure. |
| A. Iodine B. Iron C. Iridium D. Indium From the periodic table, the symbol In stands for Indium. Indium is a very soft, silvery-white metal with a brilliant luster. |
| A. Calcium B. Cadmium C. Cesium D. Bromine From the periodic table, the symbol Cd stands for Cadmium. Cadmium is a soft, bluish-white metal and is easily cut with a knife. It is similar in many respects to zinc. Cadmium and its compounds are highly toxic. |
| A. Gold B. Lead C. Silver D. Iron From the periodic table, the symbol Ag stands for Silver. Pure silver has a brilliant white metallic luster. It is a little harder than gold and is very ductile and malleable. Pure silver has the highest electrical and thermal conductivity of all metals, and possesses the lowest contact resistance. Silver is stable in pure air and water, but tarnishes when exposed to ozone, hydrogen sulfide, or air containing sulfur. |
| A. Platinum B. Plutonium C. Praseodymium D. Palladium From the periodic table, the symbol Pd stands for Palladium. Palladium is a steel-white metal, does not tarnish in air, and is the least dense and lowest melting of the platinum group metals. When annealed, it is soft and ductile. Cold working increases its strength and hardness. |
| A. Rhodium B. Rutherfordium C. Ruthenium D. Lead From the periodic table, the symbol Rh stands for Rhodium. Rhodium metal is silvery white. Rhodium has a higher melting point and lower density than platinum. It has a high reflectance and is hard and durable. Upon heating it turns to the oxide when red and at higher temperatures turns back to the element. |
| A. Rubidium B. Rutherfordium C. Ruthenium D. Lead From the periodic table, the symbol Ru stands for Ruthenium. Ruthenium is a hard, white metal. It does not tarnish at room temperatures, but oxidizes in air at about 800°C. The metal is not attacked by hot or cold acids or aqua regia, but when potassium chlorate is added to the solution, it oxidizes explosively. |
| A. Technetium B. Tin C. Titanium D. Tuncsten From the periodic table, the symbol Tc stands for Technetium. Since its discovery, searches for the element technetium in terrestrial materials have been made without success. Technetium has been found in the spectrum of S-, M-, and N-type stars, and its presence in stellar matter is leading to new theories of the production of heavy elements in the stars. Technetium is a silvery-gray metal that tarnishes slowly in moist air. Until 1960, technetium was available only in small amounts. |
| A. Moldybellyium B. Mercury C. Molybdenum D. Lead From the periodic table, the symbol Mo stands for Molybdenum. Molybdenum is a silvery-white, hard, transition metal. It was often confused with graphite and lead ore. Molybdenum is used in alloys, electrodes and catalysts. |
| A. Nobelium B. Neptunium C. Nonovbium D. Niobium From the periodic table, the symbol Nb stands for Niobium. Niobium is a shiny, white, soft, and ductile metal, and takes on a bluish tinge when exposed to air at room temperatures for a long time. The metal starts to oxidize in air at high temperatures, and when handled hot must be done so under a protective atmosphere so as to minimize oxide production. |
| A. Zirconium B. Zinc C. Zanyurnium D. Zanzibarium From the periodic table, the symbol Zr stands for Zirconium. Zirconium is a grayish-white lustrous metal. The finely divided metal can ignite spontaneously in air, especially at elevated temperatures. The solid metal is much more difficult to ignite. The inherent toxicity of zirconium compounds is low. Hafnium is invariably found in zirconium ores, and the separation is difficult. Commercial grade zirconium contains from 1 to 3% hafnium. The hafnium is removed from the zirconium used in the nuclear power industry. |
| A. yburbuim B. ytterbium C. Yttrium D. Yamantarium From the periodic table, the symbol Y stands for Yttrium. Yttrium has a silvery-metallic luster. Yttrium turnings ignite in air. Yttrium is found in most rare-earth minerals. Moon rocks contain yttrium and yttrium is used as a |
| A. Strontium B. Sodium C. Seaborgium D. Lead From the periodic table, the symbol Sr stands for Strontium. Strontium does not occur as the free element. Strontium is softer than calcium and decomposes water more vigorously. Freshly cut strontium has a silvery appearance, but rapidly turns a yellowish color with the formation of the oxide. The finely divided metal ignites spontaneously in air. |
| A. Radium B. Rhodium C. Radon D. Rubidium From the periodic table, the symbol Rb stands for Rubidium. Rubidium can be liquid at ambient temperature, but only on a hot day given that its melting point is about 40°C. It is a soft, silvery-white metallic element of the alkali metals group (Group 1). It is one of the most most electropositive and alkaline elements. |
| A. Kalvitron B. Krypton C. Kronium D. Krimigion From the periodic table, the symbol Kr stands for Krypton. Krypton is characterized by its brilliant green and orange spectral lines. The spectral lines of krypton are easily produced and some are very sharp. Under normal conditions krypton is colorless, odorless, fairly expensive gas. Solid krypton is a white crystalline substance with a face-centered cubic structure which is common to all the rare gases. |
| A. Bromine B. Bohrium C. Beryllium D. Boron From the periodic table, the symbol Br stands for Bromine. Bromine is the only liquid nonmetallic element. It is a member of the halogen group. It is a heavy, volatile, mobile, dangerous reddish-brown liquid. The red vapor has a strong unpleasant odor and the vapor irritates the eyes and throat. |
| A. Seaborgium B. Selenium C. Seeweedium D. Sodium From the periodic table, the symbol Se stands for Selenium. Selenium can be prepared with either an amorphous or crystalline structure. Crystalline mono clinic selenium is deep red; crystalline hexagonal selenium, the most stable variety, is a metallic gray. Elemental selenium is relatively nontoxic and is considered to be an essential trace element. |
| A. Astatine B. Aspertine C. Argon D. Arsenic From the periodic table, the symbol As stands for Arsenic. Arsenic is a steel gray, very brittle, crystalline, semi metallic (metalloid) solid. It tarnishes in air, and when heated rapidly oxidizes to arsenous oxide which has a garlic odor. |
| A. Gadolinium B. Gallium C. Germanium D. Gold From the periodic table, the symbol Ge stands for Germanium. Germanium is a gray-white metalloid, and in its pure state is crystalline and brittle, retaining its luster in air at room temperature. It is a very important semiconductor material. |
| A. Gadolinium B. Gallium C. Germanium D. Gold From the periodic table, the symbol Ga stands for Gallium. Gallium is the only metal, except for mercury, cesium, and rubidium, which can be liquid near room temperatures; this makes possible its use in high-temperature thermometers. It has one of the longest liquid ranges of any metal and has a low vapor pressure even at high temperatures. |
| A. Zirconium B. Zincoronium C. Zinc D. Lead From the periodic table, the symbol Zn stands for Zinc. Zinc is not particularly toxic and is an essential element in the growth of all animals and plants. |
| A. Copper B. Curium C. Cobalt D. Chromium From the periodic table, the symbol Cu stands for Copper. Copper is reddish with a bright metallic luster. It is malleable, ductile, and a good conductor of heat and electricity (second only to silver in electrical conductivity). Its alloys, brass and bronze, are very important. |
| A. Niobium B. Nickoleum C. Nickel D. Niobulium From the periodic table, the symbol Ni stands for Nickel. Nickel is a silvery white metal that takes on a high polish. It is hard, malleable, ductile, somewhat ferromagnetic, and a fair conductor of heat and electricity. |
| A. Copper B. Chlorine C. Cobalt D. Chromium From the periodic table, the symbol Co stands for Cobalt. Cobalt is a brittle, hard, transition metal with magnetic properties similar to those of iron. |
| A. Fermium B. Gold C. Lead D. Iron From the periodic table, the symbol Fe stands for Iron. Iron is a relatively abundant element in the universe. It is found in the sun and many types of stars in considerable quantity. Iron nuclei are very stable. Iron is a vital constituent of plant and animal life, and is the key component of hemoglobin. |
| A. Manganese B. Magnesium C. Monknorkium D. Lead From the periodic table, the symbol Mn stands for Manganese. Manganese is gray-white, resembling iron, but is harder and very brittle. The metal is reactive chemically, and decomposes cold water slowly. Manganese is widely distributed throughout the animal kingdom. It is an important trace element and may be essential for utilization of vitamin B. Manganese is present in quantity the floor of oceans. It is an important component of steel. |
| A. Chlorine B. Craponium C. Copper D. Chromium From the periodic table, the symbol Cr stands for Chromium. |
| A. Vaccumium B. Vantagium C. Vanadium D. Varldorium From the periodic table, the symbol V stands for Vanadium. Pure vanadium is a grayish silvery metal, and is soft and ductile. It has good corrosion resistance to alkalies, sulfuric acid, hydrochloric acid, and salt waters. |
| A. Tin B. Titanium C. Tinc D. Thulium From the periodic table, the symbol Ti stands for Titanium. Titanium is a lustrous, white metal when pure. Titanium minerals are quite common. The metal has a low density, good strength, is easily fabricated, and has excellent corrosion resistance. The metal burns in air and is the only element that burns in nitrogen. |
| A. Scandium B. Scardium C. Scalium D. Gold From the periodic table, the symbol Sc stands for Scandium. |
| A. Claminium B. Calcium C. Chlorine D. Californium From the periodic table, the symbol Ca stands for Calcium. Calcium as the element is a gray silvery metal. The metal is rather hard. Calcium is an essential constituent of leaves, bones, teeth, and shells. Calcium is the fifth most abundant element in the earth's crust and makes up more than 3% of the crust. Calcium does not occur as the metal itself in nature and instead is found in various minerals including as limestone, gypsum and fluorite. |
| A. Krypton B. Kassium C. Kellogium D. Potassium From the periodic table, the symbol K stands for Potassium. Potassium is a metal and is the seventh most abundant and makes up about 1.5 % by weight of the earth's crust. Potassium is an essential constituent for plant growth and it is found in most soils. It is also a vital element in the human diet. |
| A. Arsenic B. Artonium C. Argon D. Astatine From the periodic table, the symbol Ar stands for Argon. Argon is a colorless and odorless gas present to a very small extent in the atmosphere. Argon is very inert (indeed it is referred to as one of the noble gases) and is not known to form true chemical compounds. |
| A. Calcium B. Californium C. Clamium D. Chlorine From the periodic table, the symbol Cl stands for Chlorine. Chlorine is a greenish yellow gas which combines directly with nearly all elements. Chlorine is a respiratory irritant. |
| A. Silicon B. Silver C. Sodium D. Sulfur From the periodic table, the symbol S stands for Sulfur. Sulfur is found in meteorites, volcanoes, hot springs, and as galena, gypsum, Epsom salts, and barite. Sulfur is a pale yellow, odorless, brittle solid, which is insoluble in water but soluble in carbon disulphide. Sulfur is essential to life. It is a minor constituent of fats, body fluids, and skeletal minerals. |
| A. Phosphorus B. Platinum C. Palladium D. Potassium From the periodic table, the symbol P stands for Phosphorus. Phosphorus is an essential component of living systems and is found in nervous tissue, bones and cell protoplasm. Phosphorus exists in several allotropic forms including white (or yellow), red, and black (or violet). When pure, it is colorless and transparent. |
| A. Silver B. Silicon C. Silenium D. Silvanium From the periodic table, the symbol Si stands for Silicon. Silicon is present in the sun and stars and is a principal component of a class of meteorites known as aerolites. Silicon makes up 25.7% of the earth's crust by weight, and is the second most abundant element, exceeded only by oxygen. It is found largely as silicon oxides such as sand (silica), quartz, rock crystal, amethyst, agate, flint, jasper and opal. Silicon is found also in minerals such as asbestos, feldspar, clay and mica. |
| A. Aluminum B. Alotinium C. Albertium D. Alfredium From the periodic table, the symbol Al stands for Aluminum. Pure aluminum is a silvery-white metal with many desirable characteristics. It is light, nontoxic (as the metal), nonmagnetic and non-sparking. It is somewhat decorative. It is easily formed, machined, and cast. Pure aluminum is soft and lacks strength, but alloys with small amounts of copper, magnesium, silicon, manganese, and other elements have very useful properties. Aluminum is an abundant element in the earth's crust, but it is not found free in nature. |
| A. Manganese B. Meitnerium C. Neon D. Magnesium From the periodic table, the symbol Mg stands for Magnesium. Magnesium is a grayish-white, fairly tough metal. Magnesium is the eighth most abundant element in the earth's crust although not found in it's elemental form. It is a Group 2 element. |
| A. Potassium B. Sodium C. Namibium D. Osmium From the periodic table, the symbol Ne stands for Sodium. Sodium is a soft, silvery white, highly reactive element and is a member of the alkali metals within Group 1. |
| A. Neon B. Nickel C. Nitrogen D. Neptunium From the periodic table, the symbol Ne stands for Neon. Neon forms an unstable hydrate. In a vacuum discharge tube, neon glows reddish orange. Of all the rare gases, the discharge of neon is the most intense at ordinary voltages and currents. |
| A. Iron B. Fermium C. Fluorine D. Francium From the periodic table, the symbol F stands for Fluorine. Fluorine is the most electronegative and reactive of all elements. It is a pale yellow, corrosive gas, which reacts with practically all organic and inorganic substances. |
| A. Osmium B. Oxygen C. Oxymoronium D. Orangeium From the periodic table, the symbol O stands for Oxygen. Oxygen is the third most abundant element found in the sun, and it plays a part in the carbon-nitrogen cycle, one process responsible for stellar energy production. Oxygen in excited states is responsible for the bright red and yellow-green colors of the aurora. About two thirds of the human body, and nine tenths of water, is oxygen. The gas is colorless, odorless, and tasteless. |
| A. Neon B. Nickel C. Nobelium D. Nitrogen From the periodic table, the symbol N stands for Nitrogen. Nitrogen a Group 15 element. Nitrogen makes up about 78% of the atmosphere by volume. |
| A. Carbon B. Calcium C. Cadmium D. Chlorine From the periodic table, the symbol C stands for Carbon. Carbon is a Group 14 element and is distributed very widely in nature. It is found in abundance in the sun, stars, comets, and atmospheres of most planets. |
| A. Botaxium B. Bozozium C. Boron D. Baronium From the periodic table, the symbol B stands for Boron. Boron is a Group 13 element that has properties which are borderline between metals and non-metals (semi-metallic). It is a semiconductor rather than a metallic conductor. |
| A. Beryium B. Bentinium C. Bollywooium D. Beryllium From the periodic table, the symbol Be stands for Beryllium. Beryllium is a Group 2 (IIA) element. It is a metal and has a high melting point. At ordinary temperatures, beryllium resists oxidation in air. Beryllium compounds are very toxic. Its ability to scratch glass is probably due to the formation of a thin layer of the oxide. |
| A. Limestone B. Litmus C. Lithium D. Lozengium From the periodic table, the symbol Li stands for Lithium. Lithium is a Group 1 (IA) element containing just a single valence electron (1s22s1). Group 1 elements are called |
| A. Helium B. Hydrogen C. Hafium D. Homonium From the periodic table, the symbol He stands for - helium. Helium is one of the so-called noble gases. Helium gas is an unreactive, colorless, and odorless monoatomic gas. Helium is available in pressurized tanks. Helium is the second most abundant element in the universe after hydrogen. |
| A. Helium B. Hydrogen C. Hafium D. Homonium From the periodic table, the symbol H stands for hydrogen. Hydrogen is the lightest element. It is by far the most abundant element in the universe and makes up about about 90% of the universe by weight. Hydrogen as water (H2O) is absolutely essential to life and it is present in all organic compounds. |
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