Which of the following is the correct formula for cesium sulfide?A.CsS2B.CsSC.Cs2S2D.Cs2S

To determine the correct formula for cesium sulfide, we need to analyze the components involved.

Step 1: Identify the Ions

1. Cesium Ion (Cs): Cesium has a +1 charge, represented as $Cs^+$.
2. Sulfide Ion (S): Sulfide has a -2 charge, represented as $S^{2-}$.

Step 2: Combine the Ions

To form a neutral compound, we need to balance the total charge. Since cesium has a +1 charge, we need two cesium ions to balance the -2 charge of one sulfide ion:

• From $S^{2-}$, we need 2 $Cs^+$: $2 \times (+1) + (-2) = 0$

Step 3: Formulate the Compound

Combining the ions gives us the formula:

• 2 cesium ions and 1 sulfide ion result in $Cs_2S$.

Final Answer

The correct formula for cesium sulfide is D. Cs₂S.