Octet rule is not allowed in the formation of:
Correct answer: D. PCl5
- A. NF3
- B. CCl4
- C. CF4
- D. PCl5
Explanation
The octet rule states that atoms tend to form bonds until they have eight electrons in their valence shell. However, elements in period 3 and beyond can expand their valence shells. PCl5 is an example where phosphorus, a period 3 element, forms five bonds with chlorine, resulting in 10 electrons in its valence shell, thus not following the octet rule. In contrast, NF3, CCl4, and CF4 all conform to the octet rule, with their central atoms achieving an octet through their respective bonding arrangements.
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