MEDIUMMCQ SINGLEJEE Mains ChemistryInorganic ChemistryPeriodic PropertiesIonization Enthalpy

The element which has highest first ionization energy in the periodic table is

A.H

B.Rn

C.F

D.He✓ Correct

Explanation

1 . . I E size and . . I E stability Both are satisfied by helium. As it is a small size and a noble gas. Helium has completely filled electronic configuration. Elements with exactly half filled or completely filled electronic configurations have high first ionization energy.

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