In comparison to boron, beryllium has:
lesser nuclear charge and lesser first ionisation enthalpy
greater nuclear charge and lesser first ionisation enthalpy
greater nuclear charge and greater first ionisation enthalpy
lesser nuclear charge and greater first ionisation enthalpy
"Be" has 4 proton & "B" has 5 protons so, Nuclear charge of "Be" is less than "B"
And half filled is more stable than partially filled orbitals.
IE1 --- Be > B
2s2 2p1
Option 1)
lesser nuclear charge and lesser first ionisation enthalpy
Option 2)
greater nuclear charge and lesser first ionisation enthalpy
Option 3)
greater nuclear charge and greater first ionisation enthalpy
Option 4)
lesser nuclear charge and greater first ionisation enthalpy
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