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 __________.

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 __________.

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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 __________.

The Energy Level Diagram for Hydrogen