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+1 vote
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in NEET by (20 points)
Which of the following is isoelectronic? 1. \( CO _{2}, NO _{2} \) 2. \( NO _{2}^{-}, CO _{2} \) 3. \( CN ^{-}, CO \) 4. \( SO _{2}, CO _{2} \)

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1 Answer

+2 votes
by (18.1k points)
edited by

ions or atoms that have same number of electrons are called isoelectronic species.

Here,

CN- and CO have same number of electrons —

CN⇒ 6+7+1 = 14 e's

CO ⇒ 6+8 = 14 e's

Therefore, option (3) is right answer.

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