The total number of protons and neutrons in the nucleus of an atom is known as _________________ . Fill in the blank.
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The total number of protons and neutrons in the nucleus of an atom is known as atom.
Protons and neutrons are homogonous.
When protons and neutrons are combined together, they would form mass of atoms.
However, electrons will not be contributing high in increasing the mass of the atom.
From the chemical viewpoint, mass is totally negligible.
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