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The formula unit for the ionic compound, zinc sulfide, consists of which of the following?

? 1 Zn+ ion and 1 S- ion
? 1 Zn2+ ion and 2 S- ions
? 2 Zn+ ions and 1 S2- ion
? 1 Zn2- ion and 2 S+ ions
? 1 Zn2+ ion1 and 1 S2- ion

1 answer

The correct formula unit for the ionic compound zinc sulfide is 1 Zn²⁺ ion and 1 S²⁻ ion.

In zinc sulfide (ZnS), zinc typically forms a +2 charge (Zn²⁺) and sulfur typically forms a -2 charge (S²⁻). Therefore, the correct choice from your list would be:

  • 1 Zn²⁺ ion and 1 S²⁻ ion.