Single Choice

Which of the following species has four lone pairs of electrons in its outer shell ?

A$$I$$
B$$O^-$$
C$$Cl^-$$
Correct Answer
D$$He$$

Solution

Consider the electronic configuration of each of these options:-

A) $$ I $$ - $$ [Kr] 4d^{10} 5s^2 5p^5 \rightarrow$$ 3 lone pairs.

B) $$O^-$$ - $$ 1s^2 2s^2 2p^5 \rightarrow$$ 3 lone pairs.

C) $$Cl^-$$ - $$1s^2 2s^2 2p^6 3s^2 3p^6\rightarrow$$ 4 lone pairs.

D) $$He$$ - $$ 1s^2\rightarrow$$ 1 lone pair.

Hence option C is the right answer.

SIMILAR QUESTIONS

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