Question

Choose the answer below that accurately describes the correct molecular shape for the molecule $XeO{F}_4$.

• A. Tetrahedral
• B. Trigonal pyramidal
• C. Trigonal bipyramidal
• D. Square pyramidal

Answer 1

Answer: (D)

Square pyramidal

Given is the Lewis dot structure of $XeO{F}_4$ count the groups of electrons around the central atom (Xe) every pair of non-bonding electrons, each single bond, each double bond, and triple bond counts as one group. hence, Xe is surrounded by six groups of electrons. Any atom that is surrounded by six groups of electrons has an sp³d² hybridization and an octahedral geometry. However, because the question asks about the molecular shape (as opposed to the geometry), we look at the arrangement of the surrounding atoms. In this case, the F would make a flat square around the Xe with the oxygen atom lying directly above. This traces out a square pyramid.