Final answer:
Chlorine forms a Cl- ion, Lithium forms a Li+ ion, Sulfur forms a S2- ion, and Aluminum forms an Al3+ ion, which can be predicted by their group positions on the periodic table.
Step-by-step explanation:
For each of the following elements, the charge of its most common ion is:
Cl (Chlorine): Cl- (1- charge)Li (Lithium): Li+ (1+ charge)S (Sulfur): S2- (2- charge)Al (Aluminum): Al3+ (3+ charge)
The charges can be predicted using the periodic table, with group 1 elements (like Li) forming +1 ions, group 16 elements (like S) forming -2 ions, group 17 elements (like Cl) forming -1 ions, and group 13 elements (like Al) commonly forming +3 ions.