This trend is due to the increase in metallic bonding strength caused by unpaired d-electrons. As more d-electrons pair up towards the middle of the series, bonding becomes strongest, giving high melting points, which later decrease as pairing reduces bonding strength.
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Question
On moving across a transition series, the melting points first ______, attain a ______ value and then ______.
Fill in the Blanks
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Solution
On moving across a transition series, the melting points first increase, attain a maximum value and then decrease.
Explanation:
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