If an electron drops from 4 t h orbit to 2 n d orbit in an H - atom , then

Question

If an electron drops from 4 t h orbit to 2 n d orbit in an H - atom , then, it gains 2 .55 eV of potential energy, it gains 2 .55 eV of total energy, it emits a 2 .55 eV photon, it emits a 255 eV photon

MARKS App · Accepted Answer

E n = - 13.6 z 2 n 2 ∆ E = E 4 - E 2 = - 13.6 z 2 1 16 - 1 4 = - 13.6 × 1 - 4 16 = 13.6 × 3 16 = 2.55 eV

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