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AP EAMCET20224 Jul 2022Evening ShiftPhysicsAtomic PhysicsActual

A hydrogen atom at the grotund level absorbs a photon and is excited to n = 4 level. The potential energy of the electron in the excited state is

Options

  1. A- 0 . 85 eV
  2. B+ 0 . 85 eV
  3. C- 1 . 7 eV
  4. D+ 1 . 7 eV

Correct answer

C. - 1 . 7 eV

Step-by-step solution

Energy of hydrogen atom at ground state is - 13 . 6   eV . The relation between the principle quantum number and the energy is given by, E = - 13 . 6 n 2 ⇒ E = - 13 . 6 16 = - 0 . 85   eV Potential energy of an electron in an orbit is twice that of the total energy. Therefore, P E = - 1 . 7   eV

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