## Chemistry: Principles and Practice (3rd Edition)

(a) SF$_{4}$ (b) NCl$_{3}$ (c) N$_{2}$O$_{5}$ (d) ClF$_{3}$
For molecular compounds, prefixes are used to denote the number of atoms of each element in the compound. Therefore, we can add the number of atoms as a subscript to the immediate right of the elemental symbol. (a) SF$_{4}$ (b) NCl$_{3}$ (c) N$_{2}$O$_{5}$ (d) ClF$_{3}$