Question

why does atomic mass only depend on proton and neutron and not on electron?​

Answer 1

Answer:

The charge on the proton is equal in magnitude to that on the electron but opposite in sign—that is, the proton has a positive charge. ... The mass of a proton or neutron is about 1,836 times larger. This explains why the mass of an atom is primarily determined by the mass of the protons and neutrons in the nucleus.

Answer 2

Answer:

The charge on the proton is equal in magnitude to that on the electron but opposite in sign—that is, the proton has a positive charge. The mass of a proton or neutron is about 1,836 times larger. This explains why the mass of an atom is primarily determined by the mass of the protons and neutrons in the nucleus.

Explanation:

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