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AP EAMCET202319 May 2023Morning ShiftPhysicsAtomic PhysicsActual

The minimum excitation energy of an electron revolving in the first orbit of hydrogen is

Options

  1. A3.4 eV
  2. B8.5 eV
  3. C10.2 eV
  4. D13.6 eV

Correct answer

C. 10.2 eV

Step-by-step solution

Energy of electron in n ^ th orbit E _ n = -13.6 eV n ^2 Excitation energy of electron from n=1 to n=2 E =-13.6 [ 1 2^2 - 1 1 ]=-13.6 [ 1 4 - 1 1 ]=10⁻² eV So, Minimum excitation energy =10.2 eV

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