Question

Why electron gain enthalpy of be mg n is almost zero?

Answer 1

Answer:

This is attributed to the extra stability of the fully completed s-orbitals in Be(2s2), Mg (3s2). The gain ofelectron is highly endothermic. Thus, if an atom has fully filled orbitals, itselectron gain enthalpy value will be positive. Be and Mg have theirelectron affinity values equal to almost zero.

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