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  4. Which has maximum paramagnetic nature ?

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Q. Which has maximum paramagnetic nature ?

The d-and f-Block Elements

Solution:

(i) $\left[ Cu \left( H _{2} O \right)_{4}\right]^{+2} Cu ^{+2}=3 d ^{9}$ No. of unpaired $e^{-}=1$
(ii) $\left[ Cu \left( NH _{3}\right)_{4}\right]^{+2} Cu ^{+2}=3 d ^{9}$
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No. of unpaired electron $=1$
(iii) $Mn ^{+2}=3 d ^{5} \,4 s ^{0}$ No. of unpaired $e ^{-}=5$
image
No. of unpaired electron $=0$