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The paramagnetic species among the follo...

The paramagnetic species among the following is- `Na^(+), Zn^(2+), Cu^(+), Fe^(3+)`

A

`Na^(+)`

B

`Zn^(2+)`

C

`Cu^(+)`

D

`Fe^(3+)`

Text Solution

Verified by Experts

The correct Answer is:
D
Paramagnetic species have at least one unpaired electron. Write the electronic configurationa dn observe the unpaired orbitals.
`Na^(+) : 1s^(2), 2s^(2), 2p^(6) -` all paired:
(11)
`ZN^(2+), 1s^(2),2s^(2)2p^(6), 3s^(2) 3p^(6)3d^(10)` 0 All paired
(30)
`Cu^(+): 1s^(2),2s^(2)2s^(6), 3s^(2)3p^(6)3d^(10)` - All paired
(29)
`Fe^(3+): 1s^(2),2s^(2), 2p^(6), 3s^(2) 3p^(6) 3d^(5) -` Unpaired orbitals
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