The total energy of an electron in the first excited state of hydrogen is about $- 3.4 e V$ . Its KE in this state is

3.4 e V

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6.8 e V

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- 3.4 e V

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- 6.8 e V

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Solution

The correct option is B $3.4 e V$
The kinetic energy of the electron in first excited state, $K E = - B E = 3.4 e V$

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The total energy of an electron in the first excited state of hydrogen is about -3.4 eV. Its kinetic energy in this state is

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