What is the formula for disulfur dichloride?

Disulfur dichloride is named based on its molecular composition, which includes two sulfur atoms and two chlorine atoms. The prefix "di-" in "dichloride" indicates that there are two chlorine atoms present, while "disulfur" indicates the presence of two sulfur atoms.

Therefore, when constructing the chemical formula, we use the symbols for sulfur (S) and chlorine (Cl). The correct representation combines two sulfur atoms with two chlorine atoms, leading to the formula S2Cl2. This formula precisely reflects the information provided by the name: "disulfur" (2 sulfur atoms) and "dichloride" (2 chlorine atoms).

The other options do not accurately reflect this composition. For instance, S2Cl would imply only one chlorine atom, while Cl2S2 suggests chlorine is prioritized over sulfur in naming or structure, which is not how it’s represented chemically. ClS2 would indicate one chlorine atom and two sulfur atoms, which does not align with the indicated name. Thus, understanding the naming conventions and the prefixes is crucial to correctly determining that the formula for disulfur dichloride is S2Cl2.