Question

the molecules in the following set do not include which of the following shapes? xef₂, bf₃, brf₃, clo₄⁻ t - shaped trigonal planar trigonal pyramidal linear tetrahedral

Explanation:

• $\text{XeF}_2$: Linear shape (2 bonding pairs + 3 lone pairs on Xe).
• $\text{BF}_3$: Trigonal planar shape (3 bonding pairs, no lone pairs on B).
• $\text{BrF}_3$: T-shaped (3 bonding pairs + 2 lone pairs on Br).
• $\text{ClO}_4^-$: Tetrahedral shape (4 bonding pairs, no lone pairs on Cl).

Trigonal pyramidal is absent.

Answer:

trigonal pyramidal