Electron Geometry: The electron geometry of BrO3 (bromate ion) is tetrahedral. This is because there are four regions of electron density around the central bromine atom: three bonding pairs with oxygen atoms and one lone pair.
Molecular Geometry: The molecular geometry of BrO3 is trigonal pyramidal. While the electron geometry is tetrahedral due to the presence of one lone pair, the shape of the molecule is determined by the positions of the bonded atoms, resulting in a trigonal pyramidal configuration.
Polarity: The bromate ion (BrO3) is polar. This is due to the presence of the lone pair on the central bromine atom and the differences in electronegativity between bromine and oxygen, which creates a dipole moment in the molecule.
Central Atom Hybridization: The hybridization of the central bromine atom in BrO3 is sp³. This hybridization corresponds to its tetrahedral electron geometry, combining one s orbital and three p orbitals to accommodate the bonding and lone electron pair.