As an electron makes a transition from a...

As an electron makes a transition from an excited state to the ground state of a hydrogen - like atom /ion

A

kinetic energy decrease, potential energy increases but total energy remains same

B

kinetic energy and total energy decrease but potential energy increases

C

its kinetic energy increases but potential energy and total energy decreases

D

kinetic energy, potential energy and total energy decrease

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The correct Answer is:

A

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