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I need help with these two questions

I need help with these two questions-example-1
User Demarcus
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Answer: mass= # of neutrons + # of protons

# of neutrons = mass - # of protons

Explanation: The mass of an atom is found by adding the number of protons with the number of neutrons in the nucleus. Each proton and neutron has a mass of 1 amu. The mass of electrons is negligible.

User Lagistos
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