Chapter 2 - Atoms, Molecules, and Ions - Questions and Exercises - Exercises - Page 87: 2.106

(a) SF$_{2}$ (b) SiCl$_{4}$ (c) GaCl$_{3}$ (d) N$_{2}$O$_{3}$

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$_{2}$ (b) SiCl$_{4}$ (c) GaCl$_{3}$ (d) N$_{2}$O$_{3}$