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nirvana33 [79]
3 years ago
8

If an atom contains 12 protons and 10 neutrons, what's its mass number?

Chemistry
1 answer:
user100 [1]3 years ago
7 0
A = Z + n

A = 12 + 10

A = 22

Answer C

hope this helps!
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To balance the chemical equation the number of atoms of each element entering the reaction have to be equal to the number of atoms of each element leaving the reaction, in order to conserve the mass.

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Learn more about:

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brainly.com/question/9425444

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brainly.com/question/13941483

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