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Sigma Bond and Pi Bond

In first tran...

Question

In first transition series, the melting point of Mn is low because

Due to

configuration, metallic bonds are strong

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Due to

configuration, metallic bonds are weak

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Due to

configuration, metallic bonds are weak

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None of these

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Solution

The correct option is C Due to configuration, metallic bonds are weak
Due to $d^{5}$ configuration, metallic bonds are weak. $d^{5}$ orbital is half filled as a result 3d electrons are more tightly held by the nucleus and this reduces the de-localization of electrons resulting in weaker metallic bonding.

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