How many electron groups can likely be found on the central atom of a molecule with a trigonal planar shape?

Question

Quizplus · Accepted Answer

A molecule with a trigonal planar shape typically has three electron groups around the central atom. These groups can be bonding pairs of electrons or lone pairs, but in the case of a perfect trigonal planar shape, all three groups are usually bonding pairs with no lone pairs on the central atom.

How Many Electron Groups Can Likely Be Found on the Central