Can someone help me on number 7

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asked Jul 17, 2019 135k views

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Saolof · Answer 1 · 2019-07-20T22:26:37+0000

The answer is "C" because all isotopes have a different mass number. The number of protons does not change. The mass of electrons is negligible. Thus, the number of neutrons changes.

Can someone help me on number 7

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