Which is most polar of the following three bonds (electronegativity for given elements are Si 1.8; H 2.1; P 2.1; C 2.5; S 2.5; Cl 3.0)

Compare and contrast solutions and suspensions

Many ionic compounds and a few highly polar covalent compounds are because they completely ionize in water to create a solution filled with charged ions that can conduct an electric current.

What does a numerical subscript following an element in a chemical formula mean?