p Block Elements Part 1

All the members form volatile halides of the type AX3. All halides are pyramidal in shape. The bond angle decreases on moving down the group due to decrease in bond pair-bond pair repulsion.
NCL3‌‌PCl3‌‌AsCl3
107∘‌‌‌‌94∘‌‌‌‌‌92∘