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Question

Which of the following species have maximum number of unpaired electrons?

A
O2
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B
O+2
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C
O2
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D
O22
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Solution

The correct option is A O2

The electronic configuration of the O2 containing 16 electrons can be written as:

1s21s22s22s22pz22px22py22px12py1

The electronic configuration of the O+2 containing 16 electrons can be written as:

1s21s22s22s22pz22px22py22px12py0

The electronic configuration of the O2 ion containing 17 electrons can be written as:

1s21s22s22s22pz22px22py22px22py1

The electronic configuration of the O22 ion containing 18 electrons can be written as:

1s21s22s22s22pz22px22py22px22py2


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