Total energy of an electron in an excited state of a hydrogen atom is $-3.4 \text{ eV}$. Find the kinetic and potential energy of the electron in this state.
- A$K = -3.4 \text{ eV}, U = -6.8 \text{ eV}$
- B$K = 3.4 \text{ eV}, U = -6.8 \text{ eV}$
- C$K = -6.8 \text{ eV}, U = +3.4 \text{ eV}$
- D$K = +10.2 \text{ eV}, U = -13.6 \text{ eV}$
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