In comparison to boron, berylium has:

JEE Main - Previous Year Papers JEE MAIN 2019 PAPER 13 Single Correct MCQ

Published by: CGP EDU Academic Team

Published on: August 12, 2026

greater nuclear charge and greater first ionisation enthalpy

lesser nuclear charge and lesser first ionisation enthalpy

greater nuclear charge and lesser first ionisation enthalpy

lesser nuclear charge and greater first ionisation enthalpy

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The correct answer is:

Since boron has higher nuclear charge because it has greater atomic number and lower I.E. then beryllium due to fully filled s-orbital.

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