omy55513 omy55513

11-02-2021
Chemistry

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what is a rule for determining the mass number of an atom or ion

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skylarhinson skylarhinson

11-02-2021

Answer:

The number of electrons in a neutral atom is equal to the number of protons. The mass number of the atom (M) is equal to the sum of the number of protons and neutrons in the nucleus.

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