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)
Type | Words |
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Synonyms | atomic number 2, helium |
Type of | inert gas, argonon, chemical element, element, noble gas |
Type | Words |
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Type of | alphabetic character, letter, letter of the alphabet |
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