Question

Which of the following species contains three bond pairs and one lone pair around the central atom?


NH2-

PCl3

H2O

BF3

​

Answer 1

As we learnt in

Lewis structure -

1. pair of bonded electrons is by means of a dash (-) usually called a bond

2. Lone pairs or non-bonded electrons are represented by dots

3. Electron represent in the last shell of atoms are called valence electrons.

- wherein

Option 1)

H2O

This option is incorrect.

Option 2)

BF3

This option is incorrect.

Option 3)

This option is incorrect.

Option 4)

PCl3

This option is correct.