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The ground state energy of the hydrogen atom is

Question and options

The ground state energy of the hydrogen atom is
  1. −13.6 eV
  2. 13.6 eV
  3. 136 eV
  4. 1.36 eV

Answer and explanation

Correct answer: A - −13.6 eV
Hydrogen ground state energy E1=−13.6E_1 = -13.6 eV (bound state, negative); +13.6 eV is the ionisation energy.

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