Q.

Total energy of an atom when electron is in the 1st orbit of hydrogen atom is -13.6eV/atom. Kinetic energy of electron in the 1st excited state of Li2+ ion in eV is:

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answer is 00030.60.

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Detailed Solution

KE=13.6×Z2n2=13.6×3222=30.6eV
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Total energy of an atom when electron is in the 1st orbit of hydrogen atom is -13.6eV/atom. Kinetic energy of electron in the 1st excited state of Li2+ ion in eV is: