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03-08-2016
Chemistry

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what is atomic and mass number

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03-08-2016

The Atomic Mass Number is the number underneath the Element symbol and it is the atomic mass of the element. You can easily find the atomic mass(or get a very close number to it) by adding the protons and neutrons together. If there are 2 protons and 2 neutrons, the atomic mass would be 4.

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