* Ionic Compounds: Ionic compounds are formed by the electrostatic attraction between positively charged ions (cations) and negatively charged ions (anions).
* Barium (Ba): Barium is a metal located in Group 2 of the periodic table. Group 2 elements typically form +2 cations.
* Sulfur (S): Sulfur is a nonmetal located in Group 16 of the periodic table. Group 16 elements typically form -2 anions.
Therefore, the charge on the cation (barium) in barium sulfide is +2.
