Question

Using VSEPR theory, a molecule with the general formula AX#E# (A is the central atom, X is the bonded atom and E is a lone pair of electrons), how many regions of electron density around the central atom in AX5? (the E subscript is zero)

Answer 1

Five regions of electron density

Step-by-step explanation:

According to valence shell electron pair repulsion theory, number of electron pairs around the central atom in a molecule determines its shape.

For the compound given in the question, there is no lone pair or non-bonding electron hence there are five bond pairs around the central atom A. These five electron pairs are five regions of electron density around the central atom A. This leads to a trigonal bipyramidal shape according to VSEPR theory