Question

Mass of no of an atom is the no of proton and ______

Answer 1

Explanation:

Mass of no of an atom is the no of proton and neutron.

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Answer 2

The ____ number is equal to the number of protons in an atom. atomic number
The ____ number is equal to the number of protons + the number of neutrons. mass number
The mass number is equal to the number of protons and neutrons