VSEPR Theory

Electron domains (bonding + lone pairs) arrange to minimize repulsion:

2 domains: Linear
3 domains: Trigonal planar (0 LP), bent (1 LP)
4 domains: Tetrahedral (0 LP), trigonal pyramidal (1 LP), bent (2 LP)
5 domains: Trigonal bipyramidal (0 LP), seesaw (1 LP), T-shaped (2 LP), linear (3 LP)
6 domains: Octahedral (0 LP), square pyramidal (1 LP), square planar (2 LP)

LP = lone pairs on the central atom.

Molecular Geometry Practice

Identify the molecular geometry around the highlighted central atom.

Central atom:

Streak: 0 Best: 0

Correct: ... Incorrect: ...