In comparison to boron, beryllium has

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lesser nuclear change and lesser first ionization enthalpy

greater nuclear change and lesser first ionization enthalpy

greater nuclear change and greater first ionization enthalpy

lesser nuclear change and greater first ionization enthalpy

answer is D.

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Detailed Solution

Be = 4 Protons B = 5 Protons but Boron has less penetrating outer most electron than Be,

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