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kotykmax [81]
3 years ago
7

The mass number of an atom is obtained by totaling the number of _____.

Biology
2 answers:
ahrayia [7]3 years ago
6 0

Answer:

The answer is Protons and neutrons.

expeople1 [14]3 years ago
5 0

Answer:

The number of an atom is obtained by totaling the number of protons and neutrons, to have an equivalent number of protons and neutrons.

Explanation:

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