The sum of the numbers of protons and neutrons in a nucleus of an atom answer

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07-04-2017
Chemistry

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The sum of the numbers of protons and neutrons in a nucleus of an atom answer

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smellykat smellykat · Answer 1 · 2017-04-07T07:00:29+02:00

smellykat smellykat

07-04-2017

An atom's mass number is the sum of the numbers of protons and neutrons in its nucleus. The atomic weight is the average mass of all of the isotopes of that element.

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