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Reika [66]
3 years ago
9

What is the mass number of an atom that has 12 neutrons and 11 protons?

Chemistry
2 answers:
TiliK225 [7]3 years ago
8 0

Answer:

23

Explanation:

Tamiku [17]3 years ago
5 0
Mass number = protons + neutrons. 12 + 11 = 23.
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