Question

Is there any lone pair electrons in sp2 hybridization?and how does these lone pair electrons change the look of a molecule?

Answer 1

In some molecules with `sp^2` hybridisation, there is `1` lone pair, causing a bent molecular geometry.
In other cases, there are no lone pairs, causing a trigonal planar molecular geometry.

Explanation:

When the central atom of a molecule is `sp^2` hybridised, that means that there are `3` electron domains around it.

Keeping in mind that this central atom probably has to follow the octet rule, this gives us `2` possibilities for its structure:

• `2` single bonds and `1` double bond. This means that the molecule has a trigonal planar molecular geometry.
  
• `1` single bond, `1` double bond, and `1` lone pair. This means that the molecule has a bent molecular geometry.