Question

Why aren't electrons included in the calculation of mass number?

Answer 1

Answer:

Electrons are usually depicted in drawings as much smaller than protons or neutrons because their mass is so much smaller. In fact, electron mass is so small that it is not counted in an atom's mass

Explanation:

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Answer 2

Explanation:

Electrons are usually depicted in drawings as much smaller than protons or neutrons because their mass is so much smaller. In fact, electron mass is so small that it is not counted in an atom's mass

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