Final answer:
The bond angle for a bent molecular geometry coming from a trigonal planar electron-pair geometry is expected to be slightly less than 120° due to the space occupied by a lone pair.
Step-by-step explanation:
When considering a molecule with a trigonal planar electron geometry that has molecular geometry that is bent, the bond angle typically expected is less than 120°.
However, this can sometimes be confused with the bent shape arising from a tetrahedral electron-pair geometry, which would have a bond angle of about 104.5° as in the case of water (H2O).
But, for a bent molecular geometry that originates from a trigonal planar electron-pair geometry.
The bond angle is indeed expected to be slightly less than 120° due to the presence of a lone pair that occupies more space.