If an electron drops from 4th orbit to 2nd orbit in an H-atom then

Question

If an electron drops from 4th orbit to 2nd orbit in an H-atom then (A) it gains 2.5 5 eV of potential energy (B) it gains 2.55 eV of total energy (C) it emits a 2.55 eV electron (D) it emits a 2.55 eV photon

Tardigrade Admin · Accepted Answer

En = - (13.6 Z2/n2) eV Δ E = E4 - E2

Q. If an electron drops from 4th orbit to 2nd orbit in an H-atom then

it gains 2.5 5 eV of potential energy

it gains 2.55 eV of total energy

it emits a 2.55 eV electron

it emits a 2.55 eV photon

$E_{n} = - \frac{13.6 Z ^{2}}{n ^{2}} e V$
$Δ E = E_{4} - E_{2}$

Q. If an electron drops from 4th orbit to 2nd orbit in an H-atom then

it gains 2.5 5 eV of potential energy

it gains 2.55 eV of total energy

it emits a 2.55 eV electron

it emits a 2.55 eV photon

En​=−n213.6Z2​eV ΔE=E4​−E2​

$E_{n} = - \frac{13.6 Z ^{2}}{n ^{2}} e V$
$Δ E = E_{4} - E_{2}$