Question

10.A certain ion of an atom possesses 16 neutrons, a mass number of 31 and a charge
of-3, this ion then contains:
A. 19 protons
B. 13 electrons C. 12 electrons D. 18 electrons
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Answer 1

Answer:

B. 13 electrons

Explanation:

Bcoz protons are the same with electrons and the neutrons too.