gram-atomic weight

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Related to Gram atomic mass: Avogadro number, Gram molecular mass, Average atomic mass

gram-atomic weight,

amount of an atomic substance whose weight, in grams, is numerically equal to the atomic weightatomic weight,
mean (weighted average) of the masses of all the naturally occurring isotopes of a chemical element, as contrasted with atomic mass, which is the mass of any individual isotope. Although the first atomic weights were calculated at the beginning of the 19th cent.
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 of that substance. For example, 1 gram-atomic weight of atomic oxygen, O (atomic weight approximately 16), is 16 grams. See gram-molecular weightgram-molecular weight,
amount of a molecular substance whose weight, in grams, is numerically equal to the molecular weight of that substance. For example, one gram-molecular weight of molecular oxygen, O2
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.

gram-atomic weight

[¦gram ə¦tam·ik ′wāt]
(chemistry)
The atomic weight of an element expressed in grams, that is, the atomic weight on a scale on which the atomic weight of carbon-12 isotope is taken as 12 exactly.