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- #s- Block Elements ( Alkali and Alkaline earth metals )
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In comparison to boron, berylium has
Option: 1
Beryllium has lesser nuclear charge and lesser first ionisation enthalpy
Option: 2
Beryllium has lesser nuclear charge and greater first ionisation enthalpy
Option: 3
Beryllium has greater nuclear charge and lesser first ionisation enthalpy
Option: 4
Beryllium has greater nuclear charge and greater first ionisation enthalpy
Answers (1)
Beryllium lies left of the boron in the periodic table. On moving from left to right (Beryllium to boron), a proton is added to the nucleus due to which effective nuclear charge increases from Be to B.
Electronic configuration of Be is 1s2, 2s2
It possess completely filled s−orbital. Hence, high amount of energy is required to pull the electron from the gaseous atom.
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