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MariettaO [177]
3 years ago
14

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

Chemistry
1 answer:
Alex3 years ago
8 0
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
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