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Anamolous Behaviour of Boron

8. An excited...

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8. An excited hydrogen atom when comes directly to the ground state emits a photoelectron with de broglie wavelength 4.09 Armstrong. If work function of metal is 3.75ev find out the no of orbit of hydrogen atom in which electron was present initially.

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Q. The de-Broglie wavelength

(λ_{B})

associated with the electron orbiting in the second excited state of hydrogen atom is related to that in the ground state

(λ_{G})

Q. When an electron in hydrogen atom jumps from the third excited state to the ground state. how would the de broglie wavelength have associated with the electron change?

Q. (a) Using Bohr's second postulate of quantization of orbital angular momentum show that the circumference of the electron in the

n^{t h}

orbital state in hydrogen atom is

n

times the de-Broglie wavelength associated with it.
(b) The electron in hydrogen atom is initially in the third excited state. What is the maximum number of spectral lines which can be emitted when it finally moves to the ground state?

Q. de-Broglie wavelength associated with an electron revolving in the

n^{t h}

state of hydrogen atom is directly proportional to

Q. The de-Broglie wavelength of the electron in the ground state of the hydrogen atom is,
(radius of the first orbit of hydrogen atom

= 0.53 ˚ A

)

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Anamolous Behaviour of Boron

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