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Question

Which of the following species is isoelectronic with CO?

A
HF
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B
N2
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C
N+2
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D
O2
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Solution

The correct option is A N2
Isoelectronic species are those species which have same number of electrons. No. of electrons in:
CO: 6+8=14
HF:1+9=10
N2: 7+7=14
N+2:7+7-1=13
O2:8+8+1=17
CO and N2 are isoelectronic
option B

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