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Why is first ionisation enthalpy of Cu is higher than that of Na?

Posted by Mayur Handique 3 years, 9 months ago

CBSE > Class 12 > Chemistry

1 answers

Bharti Kaushik 3 years, 9 months ago

Because in case of sodium by losing electron , it acquires nobel gas configuration of neon but in case of copper after losing one electron, Cu achieves only fully filled d orbital. In case of copper nobel gas configuration not acquired. So, in case of sodium we have to provide lesser amount of energy as compared to copper.

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