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1. (n.) atomic weight
the average weight of an atom of an element, based on
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| Definition of 'atomic weight' |
Princeton's WordNet |
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1. (noun) atomic mass, atomic weight, relative atomic mass
(chemistry) the mass of an atom of a chemical element expressed in atomic mass units
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| Definitions of 'atomic weight' |
The Nuttall Encyclopedia |
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1. atomic weight
the weight of an atom of any body compared with that of hydrogen, the unit.
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| Definition of 'atomic weight' |
The Standard Electrical Dictionary |
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1. atomic weight
The number expressing the relative weight of the atom of any substance, that of hydrogen being generally taken as unity. This is the universal system, although any other element might be taken as the basis of the system. The whole theory of atomic weights is based on the indivisibility of the atom and on the theory of atomicity, q. v. (See Equivalents.)
[Transcriber's note: The standard is now the isotope carbon-12 as exactly 12.]
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