3 years ago

Why does the atomic mass of an atom not include the electron?

Health

2 answers:

Alex17521 [72]3 years ago

8 0

Answer:

electron mass is so small that it is not counted in an atom's mass.

Explanation:

Electrons are much smaller than protons or neutrons

almond37 [142]3 years ago

4 0

Answer:

Because the mass contributed by electrons is dwarfed by the nuclear contribution. There exists three orders of magnitude difference. Electronic mass can be ignored to a first approximation.

Explanation:

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