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Class 12
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Bohr's Model
Bohr's Model
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Bohr's Model
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Energy Levels of Hydrogen Atom
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Franck - Hertz Experiment
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Bohr's atomic model
5 mins
Terms related to Bohr's Atomic Model - I
9 mins
Terms related to Bohr's Atomic Model - II
11 mins
Reasons for failure of Bohr model
10 mins
Bohr's Postulates
8 mins
Introduction to ionization energy
7 mins
Emission Spectrum of Hydrogen.
10 mins
Hydrogen Like Atoms.
7 mins
Franck and Hertz Experiment
10 mins
Quick Summary With Stories
Bohr's Model of Atom
2 mins read
Terms related to Bohr's Atomic Model - I
2 mins read
Terms related to Bohr's Atomic Model - II
2 mins read
Problems on Bohr Model.
2 mins read
Bohr's Theory and Quantum Number of Orbits
3 mins read
Introduction to Ionization Energy
2 mins read
Ionisation Energy
3 mins read
Hydrogen Like Atoms
3 mins read
Franck and Hertz Experiment
3 mins read
Important Questions
Write Bohr's postulates for the hydrogen atom model.
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By assuming Bohr's postulates derive an expression for radius of
$n_{th}$
orbit of electron, revolving round the nucleus of hydrogen atom.
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Hydrogen atom in ground state is excited by a monochromatic radiation of
$λ=975Ao$
. Number of spectral lines in the resulting spectrum emitted will be
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Write two limitations of Bohr's model.
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The ground state energy of hydrogen atom is
$−13.6eV$
. What are the kinetic and potential energies of the electron in this state?
Easy
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What is meant by 'Quantization of charge'?
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The electron in a hydrogen atom makes a transition
$n_{1}→n_{2}$
, where
$n_{1}$
and
$n_{2}$
are the principal quantum numbers of the two energy states. Assume Bohr's model to be valid. The time period of the electron in the initial state is eight times that in the final state. What are the possible values of
$n_{1}$
and
$n_{2}$
?
Hard
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An electron of stationary hydrogen atom passes from the fifth energy level to the ground level. The velocity that the atom of mass
$m$
acquired a result of photon emission will be :
(
$R$
is Rydberg constant and
$h$
is Planck's constant)
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Using Bohr's postulates of the atomic model, derive the expression for radius of n
$_{th}$
electron orbit. Hence obtain the expression for Bohr's radius.
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The ratio of kinetic energy to the total energy of an electron in a Bohr orbit of the hydrogen atom, is?
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