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  • The electron in a hydrogen atom makes a transition from an excited state to the ground state. Which of the following statements is true ?Option: 1 n

The electron in a hydrogen atom makes a transition from an excited state to the ground state. Which of the following statements is true ?

Option: 1

 Its kinetic energy increases and its potential and total energies decrease.


Option: 2

 Its kinetic energy decreases, potential energy increases and its total energy remains the same.


Option: 3

Its kinetic and total energies decrease and its potential energy increases.  


Option: 4

Its kinetic, potential and total energies decrease.


Answers (1)

Total energy of a Bohr's atom is given as

E_n = (-13.6 eV)/n^2
Thus as n decreases, E_n also decreases.
Also KE and PE nth state is related to E_n as

KE_n = |E_n| \text{ and } PE_n = 2E_n

therefore, KE_n increases and PE_n decreases as E_n decreases.

Hence (A) is correct

Posted by

Sumit Saini

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