Which of the following reasons explains why NF5 (Nitrogen pentafluoride) does not exist?
1
Nitrogen lacks d-orbitals to expand its octet.
2
Nitrogen is too electronegative to form a stable NF5 molecule.
3
The N-F bond is too weak to support a pentafluoride structure.
4
Nitrogen cannot form more than four bonds due to its electron configuration.