It is a Group 2 element, therefore it has two outer-shell electrons. To gain a full outer-shell, it loses two electrons to form a cation (cations are positive ions)
6 valence electrons
2
14
Eight - it has a full outer shell of electrons.
The word "valance" is used to describe electrons in the outer-most energy level of an atom. Oxygen has six valance electrons.
There are 27 valance electrons.
2 valance electrons
Iodine has 7 valance electrons
They have different numbers of valance electrons
6 valence electrons
6 valence electrons
there are six
Two.
none
2
3
1