How do I find charges for ions of elements. Group 1 has 1+ charges, group 2 has a 2+ charge and so on...what about the exceptions? In can have a 3+ or a 1+ how am I supposed to figure that out?

Answer 1

see the short paragraph and visual titled

Predicting ion charges.

http://antoine.frostburg.edu/chem/senese/101/atoms/