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.

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The Answer of 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.

The Energy Level Diagram for Hydrogen