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Yair Liu
Chemistry
10 February, 05:54
What does the mass number tell us?
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Kristina Hensley
10 February, 06:03
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The mass number tells us the number (the sum of nucleons) of protons and neutrons in the nucleus of an atom ... The atomic number uniquely identifies a chemical element. In an atom of neutral charge, atomic number is equal to the number of electrons.
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