The compounds between the ions [tex]K^+[/tex] and [tex]S^{2-}[/tex] are [tex]K_2S.[/tex]
What is an ionic compound?
An ionic compound is a compound that is composed of ions. Let us note that ionic compounds are always such that the sum of the charges on the ions is zero.
You need two potassium atoms to form an ionic bond with one sulfur atom. Potassium ions are formed by donating and losing their electrons in the outermost shell, the lost electrons are gained by sulphur atom to form [tex]2K^+[/tex] and [tex]S^{2-}[/tex], respectively.
The attraction between the positive ions and negative ions gives rise to the ionic bond and the molecular formula is [tex]K_2S[/tex]
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