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Explain giving reason: (i) Transition...

Explain giving reason:
(i) Transition metals and their compounds generally exhibit a paramagnetic behave .
(ii) The chemistry of actinoids is not so smooth as that of lanthanoids.

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Paramagnetism arises due to the presence of upaired electrons with each electron having a magnetic moment associated with its spin angular momentum. As transition metals and their compounds possess unpaired electrons in their valence orbitals, they generally exhibit a paramagnetic behaviour.
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