State the postulates of bohr atom model. obtain an expression for the radius of n th orbit of an electron of hydrogen atom based on bohr's theory
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The Bohr's postulates -
1) An electron can revolve around the nucleus in certain fixed orbits of definite energy without emission of any radiant energy. Such orbits are called stationary orbits.
2) An electron can make a transition from a stationary state of higher energy E2 to a state of lower energy E1 and in doing so, it emits a single photon of frequency,
ν=E2−E1h where h is the Planck's constant.
Conversely, on absorbing an energy, E2−E1 when the electron is at energy E1, the electron can make a transition from E1 to E2.
3) Only those orbits are allowed for which the angular momentum of the electron is an integral multiple of h2π,
Thus, L=nh2π where n=0,1,2,.....
1) An electron can revolve around the nucleus in certain fixed orbits of definite energy without emission of any radiant energy. Such orbits are called stationary orbits.
2) An electron can make a transition from a stationary state of higher energy E2 to a state of lower energy E1 and in doing so, it emits a single photon of frequency,
ν=E2−E1h where h is the Planck's constant.
Conversely, on absorbing an energy, E2−E1 when the electron is at energy E1, the electron can make a transition from E1 to E2.
3) Only those orbits are allowed for which the angular momentum of the electron is an integral multiple of h2π,
Thus, L=nh2π where n=0,1,2,.....
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