Sulfur does not dissolve in water but it does dissolve in carbon disulfide

True.

Explanation:

Hello,

Solubility is strongly dependent on both solute's and solvent's polar nature, in such a way, since water is highly polar and sulfur is non-polar, a non-polar solvent must be used to dissolve it. In this case carbon disulfide is proposed, so the way to substantiate it is non-polar is via the difference in the electronegativity of the carbon and sulfur as shown below:

Since such difference is very close to zero making it a highly non-polar substance, consequently, sulfur will dissolve into it.

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the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.