Question

32 What is the overall charge of an ion that has 12 protons, 10 electrons, and 14 neutrons?

(1) 2- (3) 4­
(2) 2+ (4) 4+

Answer 1

protons have a 1+ charge
Electrons have a 1- charge
So 12-10 is 2+

Answer 2

The charge of a proton is +1, of an electron is -1, and of a neutron is 0.

12*(+1) +10*(-1) +14*0
= 12 -10
= +2

The correct answer is (2) +2.

Hope this would help~