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QuizMultiple Choice

Covalent Bonding

Question 1 • *26-27 CFISD TX-Chemistry A CR

Which compound is an exception to the octet rule?

Answer
A
H2O
B
HCl
C
CCl4
D
ClF3

Explanation

In ClF3, the central chlorine atom has three bonds to fluorine and two lone pairs, giving it 10 electrons around it. This expanded octet makes ClF3 an exception to the octet rule. H2O, HCl, and CCl4 can be drawn with atoms satisfying their usual duet or octet requirements.

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