Here is the matching of the groups to the type of ions they form:
- Group 1A: d. +1
- Group 2A: f. +2
- Group 3A: c. +3
- Group 4A: a. +4/-4
- Group 5A: h. -3
- Group 6A: b. -2
- Group 7A: e. -1
- Group 8A: g. 0
Each group is matched to the typical charge of the ions they form.