How many neutrons does element X have if its atomic number is 31 and its mass number is 84?

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asked Jan 24, 2019 199k views

1 Answer

HII · Answer 1 · 2019-01-30T23:02:21+0000

Atomic number is protons + electrons
Mass number is protons + neutrons
So to calculate the number of neutrons, you do
atomic number - atomic mass
31 - 84 = - 53

How many neutrons does element X have if its atomic number is 31 and its mass number is 84?

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