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According to Bohr's theory the ionization energy of H atom is 13.6 eV . The energy needed to remove an electron from Helium ion ( He ⁺ ) is

Options

  1. A13.6 eV
  2. B16.8 eV
  3. C27.2 eV
  4. D54.4 eV

Correct answer

D. 54.4 eV

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