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Q.

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

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a

Its kinetic energy increases and its potential and total energies decrease

b

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

c

Its kinetic and total energies decrease and its potential energy increases

d

Its kinetic, potential and total energies decrease.

answer is A.

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Detailed Solution

Ek=ke22rEp=-ke2rTotal energy E=-ke22rAs the hydrogen atom makes transition to the ground state, r decreases. Ek increases; Ep and E decrease.
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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?