Question

bef2 comes under which exception of octet rule

• A. Incomplete Octet
• B. Expanded Octet
• C. Odd-Electron Molecules
• D. None of the above

Answer 1

Answer: (A)

Incomplete Octet

Answer 2

In $BF_2$, Beryllium (Be) has only 4 valence electrons around it after forming two single bonds with Fluorine atoms. This is less than the 8 electrons required by the octet rule, which defines the exception as an incomplete octet.