Question:
The ionization energy of the hydrogen atom is 13.6 eV. What will be the ionization energy of He+ (Z=2, one-electron ion)?
The ionization energy of the hydrogen atom is 13.6 eV. What will be the ionization energy of He+ (Z=2, one-electron ion)?
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Ionization energy of a hydrogen-like ion scales as Z squared times 13.6 eV.
Updated On: Jul 3, 2026
- 13.6 eV
- 54.4 eV
- 122.4 eV
- Zero
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The Correct Option is B
Solution and Explanation
Step 1: IE = 13.6 x Z^2 eV for hydrogen-like species.
Step 2: For He+, Z=2: IE = 13.6x4 = 54.4 eV.
\[\boxed{IE(He^+) = 54.4\ eV}\]Was this answer helpful?
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