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itsai7376p74zuj
Protons and Neutrons.

Protons are the atomic number, subtract those from the atomic mass and you have your neutrons. That being said, add both together and you also get your atomic mass, or atomic weight.

Hope this helps!
briennecunningham
When protons and neutrons are added together it gives you the atomic #. This also serves as the number of the element

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