Nouns starting with A

• atomic number 46 — Noun – English ～ 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
• atomic number 108 — Noun – English ～ a radioactive transuranic element
• atomic number 92 — Noun – English ～ a heavy toxic silvery-white radioactive metallic element; occurs in many isotopes; used for nuclear fuels and nuclear weapons
• atomic number 3 — Noun – English ～ a soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals
• atomic number 82 — Noun – English ～ a soft heavy toxic malleable metallic element; bluish white when freshly cut but tarnishes readily to dull grey; "the children were playing with lead soldiers"
• atomic number 24 — Noun – English ～ a hard brittle multivalent metallic element; resistant to corrosion and tarnishing
• atomic number 84 — Noun – English ～ a radioactive metallic element that is similar to tellurium and bismuth; occurs in uranium ores but can be produced by bombarding bismuth with neutrons in a nuclear reactor
• atomic number 44 — Noun – English ～ a rare polyvalent metallic element of the platinum group; it is found associated with platinum
• atomic number 28 — Noun – English ～ a hard malleable ductile silvery metallic element that is resistant to corrosion; used in alloys; occurs in pentlandite and smaltite and garnierite and millerite
• atomic number 71 — Noun – English ～ a trivalent metallic element of the rare earth group; usually occurs in association with yttrium
• atomic number 39 — Noun – English ～ a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys
• atomic number 79 — Noun – English ～ a soft yellow malleable ductile (trivalent and univalent) metallic element; occurs mainly as nuggets in rocks and alluvial deposits; does not react with most chemicals but is attacked by chlorine and aqua regia
• atomic number 26 — Noun – English ～ a heavy ductile magnetic metallic element; is silver-white in pure form but readily rusts; used in construction and tools and armament; plays a role in the transport of oxygen by the blood
• atomic number 99 — Noun – English ～ a radioactive transuranic element produced by bombarding plutonium with neutrons
• atomic number 64 — Noun – English ～ a ductile silvery-white ductile ferromagnetic trivalent metallic element of the rare earth group
• atomic number 59 — Noun – English ～ a soft yellowish-white trivalent metallic element of the rare earth group; can be recovered from bastnasite or monazite by an ion-exchange process
• atomic number 16 — Noun – English ～ 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)
• atomic number 105 — Noun – English ～ a transuranic element
• atomic number 32 — Noun – English ～ a brittle grey crystalline element that is a semiconducting metalloid (resembling silicon) used in transistors; occurs in germanite and argyrodite
• atomic number 6 — Noun – English ～ an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds

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