Question

Write the formula of compound formed when sulphur combines with potassium

Answer 1

When sulfur combines with potassium, they form potassium sulfide. The chemical formula for potassium sulfide is \( \text{K}_2\text{S} \). Each potassium (K) ion has a +1 charge, while the sulfide (S) ion has a -2 charge. Thus, two potassium ions are needed to balance the charge of one sulfide ion.