What is the molecular geometry of a molecule with 4 outer atoms and 1 lone pair on the central atom?

The compound C₃H₄ has two double bonds. Describe its bonding and geometry, using a valence bond approach.

Give the number of total electron groups, the number of bonding groups, and the number of lone pairs for the geometry depicted in (a).

Indicate the electron pair geometry and the molecular geometry for each of the six compounds.