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What is the energy of a hydrogen atom in...

What is the energy of a hydrogen atom in the first excited state if the potential energy is taken to be zero in the ground state?

A

`10.2eV`

B

`13.6eV`

C

`23.8eV`

D

`27.2eV`

Text Solution

Verified by Experts

The correct Answer is:
C
`P.E_(2)=(27.2)/4+27.2=20.4eV`
` K.E_(1)=13.6eV,K.E_(2)=3.4eV` therefore T.e=20.4+3.4=23.8eV`
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