Home Chemistry Classification of Elements and Periodicity Ionisation Energy Beryllium has higher ionisation enthalpy tha…
Chemistry Classification of Elements and Periodicity Ionisation Energy Single Correct MCQ
Published on: August 13, 2026

Beryllium has higher ionisation enthalpy than boron. This can be explained as,

A
Beryllium has higher size than boron hance its ionisation enthalpy is higher
B
Penetration of 2p – electrons to the nucleus is more than the 2s – electrons
C
It is easier to remove electron from 2p – orbital as compared to 2s – orbital due to more penetration of s – electrons
D
Ionisation energy increases in a period.

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The correct answer is:
C

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