What is the mass number of an atom that has 5 protons and 7 neutrons?

Mass number = No. of protons + No. of neutrons
= 5 + 7
= 12 u.
Thus, the answer is 12 u.

Answered by tadvisohil886 | 2024-06-10

mass number = protons + neutrons mass number = 5 + 7 mass number = 12

Answered by iloveonedirection | 2024-06-10

The mass number of an atom with 5 protons and 7 neutrons is 12. This is calculated by adding the number of protons and neutrons together. Thus, mass number A = 12 .
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Answered by tadvisohil886 | 2024-10-09