Question

what is the formula for a mass number of on atom ​

Answer 1

Answer:

proton + neuton

Explanation:

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Answer 2

Answer:

Together, the number of protons and the number of neutrons determine an element's mass number: mass number = protons + neutrons. If you want to calculate how many neutrons an atom has, you can simply subtract the number of protons, or atomic number, from the mass number.

Explanation:

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