Atomic StructureHard

Question

The ionization energy of He-atom in the ground state may be

Options

A.13.6 eV

B.54.4 eV

C.108.8 eV

D.27.0 eV

Solution

Second I.E. of He is 13.6 × 2² = 54.4 eV. Hence, I.E. of He-atom must be greater than 13.6 eV but less than 54.4 eV.

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