Fewpal
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In a hydrogen atom, if magnitude of energy of an electron in the ground state is 13.6 ev, then that in the 2nd excited state is ???

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We know in a Hydrogen atom, if energy of an electron in ground state is 13.6 eV, then that in the 2nd excited state is 1.51 eV.

Explanation:

Second excited state is the third energy level (i.e n = 3)

So, E3 = -13.6/(3)2 eV

i.e = E3 = -1.51eV

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