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Bohr's model of hydrogen atom In order t...

Bohr's model of hydrogen atom
In order to explain the stability of atom and its line spectra, Bohr gave a set of postulates:
An electron in an atom revolves in certain circular orbit around the nucleus. These are the orbits for which `mvr=(nh)/(2pi)`
In these allowed orbits, the electron does not radiate energy.
When an electron jumps from higher energy level `E_(n_2)` to lower energy orbit `E_(n_1)`, radiation is emittd and frequency of emitted electron is given by `v=(E_(n_2)-E_(n_1))/h`. Further the radius of the `n^(th)` orbit of hydrogen atom is `r=(n^2h^24piepsilon_0)/(4pi^2me^2)` and energy of the `n^(th)` orbit is given by `E_n=-13.6/n^2 eV`.
If 13.6 eV energy is required to ionise the hydrogen atom, then enegy required to remove an electron from n=2 is:

A

10.2 eV

B

0 eV

C

3.4 eV

D

6.0 eV

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Bohr's model of hydrogen atom In order to explain the stability of atom and its line spectra, Bohr gave a set of postulates: An electron in an atom revolves in certain circular orbit around the nucleus. These are the orbits for which mvr=(nh)/(2pi) In these allowed orbits, the electron does not radiate energy. When an electron jumps from higher energy level E_(n_2) to lower energy orbit E_(n_1) , radiation is emittd and frequency of emitted electron is given by v=(E_(n_2)-E_(n_1))/h . Further the radius of the n^(th) orbit of hydrogen atom is r=(n^2h^24piepsilon_0)/(4pi^2me^2) and energy of the n^(th) orbit is given by E_n=-13.6/n^2 eV . When hydrogen atom is the first excited level, it radius is:,

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