Question

Which of the following ions will be most likely to form when selenium ionizes?

A.) Se 6+
B.) Se 4+
C.) Se 2+
D.) Se 2-
E.) Se 4-

Answer 1

2-
selenium has 6 valance electrons, therefore in order to be electronically stable, it wants to gain two electrons, in order to have a full shell of 8 valance electrons.
when an atom gain electrons, it becomes negatively charged, therefore the charge is 2-

Answer 2

Thanks :) @nechirwan

Answer 3

u welcome :D