## Chemistry: Molecular Approach (4th Edition)

Published by Pearson

# Chapter 3 - Section 3.5 - Ionic Compounds: Formulas and Names - For Practice: 3.3

#### Answer

The formula of the compound formed is $K_2S$.

#### Work Step by Step

Potassium forms the cation $K^+$. Sulphur forms the anion $S^{2-}$. To balance the charges, two ions of potassium react with one ion of sulphur. So, the formula of the compound formed is $K_2S$.

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