1.30     recall the charges of common ions in this specification

Some charges will simply correspond to the group the element is in:

Group	Number of electrons in outer shell	What it does to get a full outer shell	Charge of resulting ion
1	1	Lose 1	1+
2	2	Lose 2	2+
3	3	Lose 3	3+
5	5	Gain 3	3-
6	6	Gain 2	2-
7	7	Gain 1	1-

Additional ions you need to know: