Words starting with A that are validated

• atomic number 77 — Noun – English ～ a heavy brittle metallic element of the platinum group; used in alloys; occurs in natural alloys with platinum or osmium
• atomic number 89 — Noun – English ～ a radioactive element of the actinide series; found in uranium ores
• atomic number 74 — Noun – English ～ a heavy grey-white metallic element; the pure form is used mainly in electrical applications; it is found in several ores including wolframite and scheelite
• atomic number 107 — Noun – English ～ a transuranic element
• atomic number 25 — Noun – English ～ a hard brittle grey polyvalent metallic element that resembles iron but is not magnetic; used in making steel; occurs in many minerals
• atomic number 31 — Noun – English ～ 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
• atomic number 72 — Noun – English ～ a grey tetravalent metallic element that resembles zirconium chemically and is found in zirconium minerals; used in filaments for its ready emission of electrons
• atomic number 10 — Noun – English ～ 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
• atomic number 4 — Noun – English ～ a light strong brittle grey toxic bivalent metallic element
• atomic number 52 — Noun – English ～ 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
• atomic number 50 — Noun – English ～ a silvery malleable metallic element that resists corrosion; used in many alloys and to coat other metals to prevent corrosion; obtained chiefly from cassiterite where it occurs as tin oxide
• atomic number 8 — Noun – English ～ 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
• atomic number 78 — Noun – English ～ a heavy precious metallic element; grey-white and resistant to corroding; occurs in some nickel and copper ores and is also found native in some deposits
• atomic number 21 — Noun – English ～ a white trivalent metallic element; sometimes classified in the rare earth group; occurs in the Scandinavian mineral thortveitite
• atomic number 67 — Noun – English ～ a trivalent metallic element of the rare earth group; occurs together with yttrium; forms highly magnetic compounds
• atomic number 7 — Noun – English ～ 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
• atomic number 93 — Noun – English ～ a radioactive transuranic metallic element; found in trace amounts in uranium ores; a by-product of the production of plutonium
• atomic number 62 — Noun – English ～ a grey lustrous metallic element of the rare earth group; is used in special alloys; occurs in monazite and bastnasite
• atomic number 40 — Noun – English ～ 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
• atomic number 42 — Noun – English ～ a polyvalent metallic element that resembles chromium and tungsten in its properties; used to strengthen and harden steel

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