Question

If the valence electrons were removed, what would be the ion charge of the element?

Mg = _____

A. -1
B. +1
C. -2
D. +2

Answer 1

If valence electron i.e electron from 3s orbital is removes, sodium will have configuration same as Neon with a +1 charge on it.
Hence charge on the ion will be +1.

Answer 2

Answer: The correct answer is Option D.

Explanation:

Magnesium is the 12th element of the periodic table and the valence electronic configuration for this element is: $[Ne]3s^2$

This element will loose 2 electrons to attain stable electronic configuration.

By loosing 2 electrons, this element will attain a charge of +2 units.

The electronic configuration after loosing 2 electrons and forming $Mg^{2+}$ ion is $1s^22s^22p^6$

Hence, the correct answer is Option D.