what is the atomic weight of atom
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4
Answer:
Atomic weight, also called relative atomic mass, ratio of the average mass of a chemical element's atoms to some standard. Since 1961 the standard unit of atomic mass has been one-twelfth the mass of an atom of the isotope
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2
Answer:
12
Explanation:
protons=6
neutrons=6
6+6=12
atomic mass=12
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