Question

What are the exceptions of the octet rule?

• A. The incomplete octet for central atom?
• B. An odd number of electrons on central atom
• C. Expanded octet of the central atom
• D. All of these.

Answer 1

Answer: (D)

All of these.

Answer 2

: According to octet rule, the central atom must have 8 electrons but in some compounds the number of electrons is more than 8, or less than 8 or an odd number of electrons is left on the central atom e.g., $PCl_{5}BF_{3},NO$