Words starting with A that are validated

• atomic number 36 — Noun – English ～ a colorless element that is one of the six inert gasses; occurs in trace amounts in air
• atomic number 17 — Noun – English ～ 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)
• atomic number 15 — Noun – English ～ a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells; is highly reactive and occurs in several allotropic forms
• atomic number 80 — Noun – English ～ a heavy silvery toxic univalent and bivalent metallic element; the only metal that is liquid at ordinary temperatures
• atomic number 113 — Noun – English ～ a radioactive transuranic element
• atomic number 60 — Noun – English ～ a yellow trivalent metallic element of the rare earth group; occurs in monazite and bastnasite in association with cerium and lanthanum and praseodymium
• 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

Previous ·1 ··· 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 ··· 1072 ·Next