Chemistry, asked by lalaboop23, 3 months ago

mass number is the total number of and in the nucleus of an atom

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Answered by SinisterX

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Rutherford showed that the vast majority of the mass of an atom is concentrated in its nucleus, which is composed of protons and neutrons. The mass number is defined as the total number of protons and neutrons in an atom. Consider Table below which shows data from the first six elements of the periodic table.

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