The energy level diagram for hydrogen
-The smallest energy of an absorbed photon that will raise a hydrogen atom from its ground state to its first excited state is 13.6 eV.

Question

The energy level diagram for hydrogen 
-The smallest energy of an absorbed photon that will raise a hydrogen atom from its ground state to its first excited state is 13.6 eV.

Quizplus · Accepted Answer

The energy required to raise a hydrogen atom from its ground state to its first excited state is 10.2 eV, not 13.6 eV. 13.6 eV is the ionization energy needed to remove an electron from the ground state.

The Energy Level Diagram for Hydrogen