Question

Give reason electron gain enthalpy of be and mg are positive

Answer 1

The gain of electron is highly endothermic. Thus, if an atom has fully filled orbitals, itselectron gain enthalpy value will bepositive. 1 .Be and Mg are electropositive in nature. ... This addition of new electronis very energetically unfavorable and so this accounts for the more positive electron affinity.

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