The total energy of an electron in an atom in an orbit is −3.4 eV. Its kinetic and potential energies are, respectivély :

1
−3.4 eV, −3.4 eV
2
−3.4 eV, −6.8 eV
3
3.4 eV, −6.8 eV
4
3.4 eV, 3.4 eV

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