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An electron in a mercury atom changes from energy level b to a higher energy level when the

atom absorbs a single photon with an energy of 3.06 electronvolts.


Determine the energy of the photon, in joules.

Verified Answer :

The energy of the photon will be 7.32 joules.

What are energy level in atoms?

Energy levels (also called electron shells) are fixed distances from the nucleus of an atom where electrons may be found.

  • When an electron absorbs photon or energy it moves to higher energy levels to lower energy levels.
  • When an electron releases photon or energy it moves to lower energy levels to higher energy levels.

What is band gap in an atom?

The band gap is the minimum amount of energy required for an electron to break free of its bound state.

  • The absorbed energy is  Ea = 3.06 volts.
  • The band gap energy  is Eg = 10.38 volts.

So, energy of photon will be E = Eg - Ea

                                                E = 10.38 - 3.06

Thus , The energy of photon will be 7.32 joules.

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