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Discover LudwigThe phrase "atomic weight" is correct and usable in written English.
It is typically used in scientific contexts to refer to the weighted average mass of an element's isotopes compared to the mass of a carbon-12 atom.
Example: "The atomic weight of carbon is approximately 12.01 atomic mass units."
Alternatives: "atomic mass" or "relative atomic mass".
Dictionary
atomic weight
noun
Former term for the more specific relative atomic mass.
synonyms
Exact(59)
Today the atomic weight of an element is recognized as the weighted average of the masses of its isotopes.
The atomic and molecular theory of matter asserts that the atomic weight of any element in grams must contain the same number of atoms as the atomic weight in grams (the gram-atomic weight) of any other element.
Ordinarily, carbon atoms are made up of six protons and six neutrons, giving them an atomic weight of 12.
See also atomic weight.
Deuterium has an atomic weight of 2.014.
Elements with an atomic weight given in square brackets have an atomic weight that is given as a range.
Magnesium, atomic weight 24.312, was lighter by a third than aluminum.
However the atomic weight of strontium is 87.62 and that of caesium 132.9.
The cylinder surface was divided into 16 parts, based on the atomic weight of oxygen.
But occasionally, they have an extra neutron, giving them an atomic weight of 13.
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The triad was the earliest atomic-weight classification of the elements.
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