Why atomisation enthalpy of second and …

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Yogita Ingle 5 years, 10 months ago
Enthalpy of atomisation depend upon the number of unpaired electron more is unpaired electron more is enthalpy of atomisation.Upto the middle of the series, the number of unpaired electrons increases and then decreases due to their pairing. This results first in the increase and then decrease in the value of enthalpy of atomisation.
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