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level: Level 1, 1-54

Questions and Answers List

The first half of the Periodic Table

level questions: Level 1, 1-54

Question	Answer
Element #1; a nonmetallic univalent element that is normally a colorless and odorless highly flammable diatomic gas; the simplest and lightest and most abundant element in the universe	Hydrogen
Element #2; a very light colorless element that is one of the six inert gasses; the most difficult gas to liquefy; occurs in economically extractable amounts in certain natural gases (as those found in Texas and Kansas)	Helium
Element #3; a soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals	Lithium
Element #4; a light strong brittle grey toxic bivalent metallic element	Beryllium
Element #5; a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder	Boron
Element #6	Carbon
Element #7; a common nonmetallic element that is normally a colorless odorless tasteless inert diatomic gas; constitutes 78 percent of the atmosphere by volume; a constituent of all living tissues	Nitrogen
Element #8; a nonmetallic bivalent element that is normally a colorless odorless tasteless nonflammable diatomic gas; constitutes 21 percent of the atmosphere by volume; the most abundant element in the earth's crust	Oxygen
Element #9; a nonmetallic univalent element belonging to the halogens; usually a yellow irritating toxic flammable gas; a powerful oxidizing agent; recovered from fluorite or cryolite or fluorapatite	Fluorine
Element #10; a colorless odorless gaseous element that give a red glow in a vacuum tube; one of the six inert gasses; occurs in the air in small amounts	Neon
Element #11; a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)	Sodium
Element #12; a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine)	Magnesium
Element #13; a silvery ductile metallic element found primarily in bauxite	Aluminum
Element #14; a tetravalent nonmetallic element; next to oxygen it is the most abundant element in the earth's crust; occurs in clay and feldspar and granite and quartz and sand; used as a semiconductor in transistors	Silicon
Element #15	Phosphorus
Element #16; an abundant tasteless odorless multivalent nonmetallic element; best known in yellow crystals; occurs in many sulphide and sulphate minerals and even in native form (especially in volcanic regions)	Sulfur
Element #17; a common nonmetallic element belonging to the halogens; best known as a heavy yellow irritating toxic gas; used to purify water and as a bleaching agent and disinfectant; occurs naturally only as a salt (as in sea water)	Chlorine
Element #18; a colorless and odorless inert gas; one of the six inert gases; comprises approximately 1% of the earth's atmosphere	Argon
Element #19; a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite	Potassium
Element #20; a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals	Calcium
Element #21; a white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite	Scandium
Element #22; a light strong grey lustrous corrosion-resistant metallic element used in strong lightweight alloys (as for airplane parts); the main sources are rutile and ilmenite	Titanium
Element #23; a soft silvery white toxic metallic element used in steel alloys; it occurs in several complex minerals including carnotite and vanadinite	Vanadium
Element #24; a hard brittle multivalent metallic element; resistant to corrosion and tarnishing	Chromium
Element #25; a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals	Manganese
Element #26	Iron
Element #27; a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition	Cobalt
Element #28	Nickel
Element #29	Copper
Element #30; a bluish-white lustrous metallic element; brittle at ordinary temperatures but malleable when heated; used in a wide variety of alloys and in galvanizing iron; it occurs naturally as zinc sulphide in zinc blende	Zinc
Element #31; a rare silvery (usually trivalent) metallic element; brittle at low temperatures but liquid above room temperature; occurs in trace amounts in bauxite and zinc ores	Gallium
Element #32; a brittle grey crystalline element that is a semiconducting metalloid (resembling silicon) used in transistors; occurs in germanite and argyrodite	Germanium
Element #33; a very poisonous metallic element that has three allotropic forms; arsenic and arsenic compounds are used as herbicides and insecticides and various alloys; found in arsenopyrite and orpiment and realgar	Arsenic
Element #34; a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)	Selenium
Element #35; a nonmetallic heavy volatile corrosive dark brown liquid element belonging to the halogens; found in sea water	Bromine
Element #36; a colorless element that is one of the six inert gasses; occurs in trace amounts in air	Krypton
Element #37; a soft silvery metallic element of the alkali metal group; burns in air and reacts violently in water; occurs in carnallite and lepidolite and pollucite	Rubidium
Element #38; a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite	Strontium
Element #39; a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys	Yttrium
Element #40; a lustrous grey strong metallic element resembling titanium; it is used in nuclear reactors as a neutron absorber; it occurs in baddeleyite but is obtained chiefly from zircon	Zirconium
Element #41; a soft grey ductile metallic element used in alloys; occurs in niobite; formerly called columbium	Niobium
Element 42; a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel	Molybdenum
Element #43; a crystalline metallic element not found in nature; occurs as one of the fission products of uranium	Technetium
Element #44; a rare polyvalent metallic element of the platinum group; it is found associated with platinum	Ruthenium
Element #45; a white hard metallic element that is one of the platinum group and is found in platinum ores; used in alloys with platinum	Rhodium
Element #46; a silver-white metallic element of the platinum group that resembles platinum; occurs in some copper and nickel ores; does not tarnish at ordinary temperatures and is used (alloyed with gold) in jewelry	Palladium
Element #47	Silver
Element #48; a soft bluish-white ductile malleable toxic bivalent metallic element; occurs in association with zinc ores	Cadmium
Element #49; a rare soft silvery metallic element; occurs in small quantities in sphalerite	Indium
Element #50; a toxic nonmetallic element related to sulfur and tellurium; occurs in several allotropic forms; a stable grey metallike allotrope conducts electricity better in the light than in the dark and is used in photocells; occurs in sulfide ores (as pyrite)	Selenium
Element #51; a metallic element having four allotropic forms; used in a wide variety of alloys; found in stibnite	Antimony
Element #52; a brittle silver-white metalloid element that is related to selenium and sulfur; it is used in alloys and as a semiconductor; occurs mainly as tellurides in ores of copper and nickel and silver and gold	Tellurium
Element #53	Iodine
Element #54; a colorless odorless inert gaseous element occurring in the earth's atmosphere in trace amounts	Xenon