What is the total number of electrons in a mg2+ ion? a) 14 b) 24 c) 10 d) 12 would it be 10 or 12 and why?
A Mg2+ ion would have 10 electrons because it lost 2 to meet the octet rule when it reacted.
The answer is (1) 10. The protons of Mg atom is 12. So the Mg atom has 12 electrons. The Mg2+ ion has lost two electrons so it has two positive charge. Then the answer is 10 electrons.