Word:

atomic number 2

Noun1.atomic number 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)
Synonyms: He, helium
argonon, chemical element, element, He, helium, inert gas, noble gas
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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
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atomic number 14
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atomic number 17
atomic number 18
atomic number 19
-- atomic number 2 --
atomic number 20
atomic number 21
atomic number 22
atomic number 23
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atomic number 26
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atomic number 28
atomic number 29
atomic number 3
atomic number 30
atomic number 31
atomic number 32
atomic number 33
atomic number 34
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