List three rules for the linear combination of atomic orbitals.

Predict the structure of each of the following and indicate whether the bond angles are likely to be distorted from the theoretical values:

(a) ${\mathrm{BeCl}}_2$ (b) ${\mathrm{BCl}}_3$ (c) ${\mathrm{SiCl}}_4$ (d) ${\mathrm{PCl}}_5$ (vapor)
(e) ${\mathrm{PF}}_3$ (f) ${\mathrm{F}}_2\mathrm{O}$ (g) ${\mathrm{SF}}_4$ (h) ${\mathrm{IF}}_5$ (i) ${\mathrm{SO}}_2$ (j) ${\mathrm{SF}}_6$.