Question

What is the total number of electron domains in the molecule with the molecular formula AX7?

1) 5
2) 6
3) 7
4) 8

Answer 1

The molecule with the molecular formula AX7 has seven electron domains, corresponding to the seven bonding pairs around the central atom.

Step-by-step explanation:

The molecule represented by the molecular formula AX7 refers to a molecule with a central atom 'A' surrounded by seven atoms 'X'. In such molecules, the total number of electron domains is equal to the number of bond pairs and lone pairs around the central atom. Since there are seven 'X' atoms bonded to the central atom and we are considering a scenario without lone pairs on 'A', the molecule AX7 has seven bonding pairs and therefore seven electron domains.