Question

a) For the following molecule and ion AlCl3 and NH2
i. Draw the shape (showing the lone pair(s) and bond pair(s) of electrons)
ii. State bond angle(s)
iii. Give the overall polarity

Answer 1

Definitions :

Polarity - charge on the compound.

Lone pair — A pair of valence electrons not shared with another atom and is sometimes called non bonding pair.

Bond angle — Angle formed between three atoms across at least two bonds.

Bond angle for :

AlCl₃ = 116°

Polarity = 0

NH₂ = 104.5°

Polarity = - 1

Find diagrams in the image below.