Chapter 2 - Atoms, Molecules, and Ions - Questions and Exercises - Exercises - Page 87: 2.105

(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$_{3}$