human
What determines the charge of a 1-2 or 13-18 group ion in chemistry.
gpt
The charge on the ion determines the charge of a 1-2 or 13-18 group.
Explanation: Main group elements 1 and 2 (alkali and alkaline earth metals), and 13 to 18 (boron group to noble gases), gain or lose electrons to form ions with a charge equal to their group number in main groups 1-2 and 18 or the octet rule applies for 13-18, generally in noble gas electron configuration.