Question

Which of the following elements will form a cation with a +2 charge?

A.) Si
B.) Sr
C.) Ga
D.) Cs
E.) S

Answer 1

One of the first things you may want to consider is look for elements in Group 2A on the Periodic Table. These elements are metals that have 2 valence electrons, or 2 electrons that the atom can give up easily.
Look at a Periodic Table, you'll see it.

Answer 2

Okay got it thanks :) @iPwnBunnies