In comparison to boron, beryllium has:

 

  • 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

Answers (1)

 

 

 

"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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