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Manipal MET2019PhysicsAtomic Physics

Minimum energy required to take out the only one electron from ground state of He ⁺ is

Options

  1. A13.6 eV
  2. B54.4 eV
  3. C27.2 eV
  4. D6.8 eV

Correct answer

B. 54.4 eV

Step-by-step solution

Ionisation energy E=13.6 Z^2 For He ⁺, Z=2E=13.6(2)^2=13.6 4=54.4 eV

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