Solution: Determine the electron-group arrangement,

Solution 35P:

Here, we are going to determine the electron-group arrangement, molecular shape, and ideal bond angle(s) for each of the following molecules.

Step 1:

The valence-shell electron-pair repulsion (VSEPR) theory is based on the electron groups around the central atom.

An electron group can be an electron pair, a lone pair, a single unpaired electron, a double bond or a triple bond on the center atom. VSEPR theory can help to predict the shape of a molecule.

According to VSEPR theory,

1. The geometry of a molecule is determined by the number of electron groups on the central atom.
2. The number of electron groups is determined from the Lewis structure of the molecule.
3. The geometry of the electron groups is determined by their repulsions

Lone pair–lone pair >  lone pair–bonding pair >  bonding pair–bonding pair