Textbook Problem

Write a Lewis structure for each of the following simple molecules. Show all bonding valence electron pairs as lines and all nonbonding valence electron pairs as dots.

msp;  $\begin{array}{l}\text{a}.{\text{ C}}_{\text{2}}{\text{H}}_{\text{6}} \text{d}.{\text{ C}}_{\text{4}}{\text{H}}_{\text{1}0}\\ \text{b}.{\text{ NF}}_{\text{3}} \text{d}.{\text{ SiCl}}_{\text{4}}\end{array}$