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21-03-2017
Physics

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If an isotope has 8 protons and 10 neutrons in it's nucleus, what is it's atomic mass?

A. 18
B. 8
C. 10
D. not enough information to calculate

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XxWellesleyxX XxWellesleyxX

21-03-2017

The atomic mass is always equal to the sum of protons and neutrons in the nucleus. If you add the number of protons and neutrons (8 + 10) = 18 you will find that the atomic mass is 18.

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