Question

What is the total number of electron domains in the molecule with the molecular formula AX3E?

1) 2
2) 3
3) 4
4) 5

Answer 1

The molecular formula AX3E represents a molecule with four electron domains, consisting of three single bonds to surrounding atoms and one lone pair on the central atom.

Step-by-step explanation:

The total number of electron domains in a molecule with the molecular formula AX3E (where A represents the central atom, X represents surrounding atoms, and E represents a lone pair of electrons) is four. The term 'electron domains' includes both bonding and lone pairs of electrons. The formula AX3E indicates there are three single bonds from the central atom to three surrounding atoms (AX3) and one lone pair of electrons on the central atom (E). Thus, AX3 + E = 3 + 1 = 4 electron domains.