The total energy of the electron in the ground state of hydrogen is -13.6 eV. The kinetic energy in the first excited state is:
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Question

The total energy of the electron in the ground state of hydrogen is −13.6 eV. The kinetic energy in the first excited state is:

G1 Physics · Accepted Answer

First excited state n = 2 has E₂ = −3.4 eV. In a Coulomb orbit K = −E₂ = 3.4 eV. Answer: D.