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Q 12.15  (a)  The total energy of an electron in the first excited state of the hydrogen atom is about –3.4 eV.

  What is the kinetic energy of the electron in this state?

Answers (1)

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Since we know that kinetic energy is equal to the negative of the total energy

K=-E

K=-(-3.4)

K=3.4 eV

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Sayak

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