Q.

The ground state and first excited state energies of hydrogen atom are  13.6eV and -3.4 eV respectively. If potential energy in ground state is taken to be zero, then

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a

Kinetic energy in the first excited state would be 3.4 eV 

b

Potential energy in the first excited state would be 20.4 eV 

c

Total energy in the first excited state would be 23.8 eV 

d

Total energy in the ground state would be 13.6 eV. 

answer is A, B, C, D.

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The ground state and first excited state energies of hydrogen atom are  −13.6eV and -3.4 eV respectively. If potential energy in ground state is taken to be zero, then