Word:

atomic number 1

Noun1.atomic number 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
Synonyms: H, hydrogen
chemical element, element, gas, H, H2O, hydrogen, tritium, water
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Atom bomb
atom smasher
atom-bomb
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atomic bomb
atomic clock
atomic cocktail
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Atomic Energy Commission
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atomic mass
atomic mass unit
atomic number
-- atomic number 1 --
atomic number 10
atomic number 100
atomic number 101
atomic number 102
atomic number 103
atomic number 104
atomic number 105
atomic number 106
atomic number 107
atomic number 11
atomic number 12
atomic number 13
atomic number 14
atomic number 15
atomic number 16
atomic number 17
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