Question

what is the name of k2s?
potassium sulfide
carbon sulfide
potassium sulfate
potassium sulfite

Explanation:

• \(K\) is the symbol for potassium.
• \(S\) is the symbol for sulfur. In ionic compounds, when naming, the metal (potassium here) is named first, and then the non - metal (sulfur) with its ending changed to “-ide” for simple binary ionic compounds.
• Potassium sulfate is \(K_2SO_4\), potassium sulfite is \(K_2SO_3\), and carbon sulfide would involve \(C\) (carbon) which is not present in \(K_2S\).

Answer:

potassium sulfide