Question

What is the total number of electron domains in the molecule with the molecular formula AX2E3?

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

Answer 1

The molecule AX2E3 has a total of 5 electron domains, which include both bonding domains from the two atoms "X" and three lone pairs of electrons "E."

Step-by-step explanation:

The total number of electron domains in a molecule with the molecular formula AX2E3 is 5. The notation "AX2E3" specifies a central atom "A" bonded to two atoms "X" and having three lone pairs of electrons "E." These lone pairs are also referred to as electron domains, along with the bonding domains.

For instance, in the molecule XeF₂, xenon (Xe) is the central atom "A", fluorine (F) are the two atoms "X", and there are three lone pairs of electrons "E", totaling in five areas of electron density or domains around the central atom (two from the fluorine atoms and three from the lone electron pairs).