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An electron jumps from the first excited...

An electron jumps from the first excited state to the ground stage of hydrogen atom..What will be the percentage change in the speed of electron ?

A

0.25

B

0.5

C

1

D

2

Text Solution

Verified by Experts

The correct Answer is:
B
Velocity of electron in nth shell
`v_(n) prop (1)/(n)` so, `(v_(2))/(v_(1))=(1)/(2)`
i.e., `v_(2)=(v_(1))/(2) implies Deltav=v_(1)-v_(2)=(v_(1))/(2)`
Hence, % change=50%.
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MHTCET PREVIOUS YEAR PAPERS AND PRACTICE PAPERS-ATOMS, MOLECULES AND NUCLEI -Exercise 1 (TOPICAL PROBLEMS)
  1. The ionization enegry of the electron in the hydrogen atom in its grou...

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  2. If v1 is the frequency of the series limit of lyman seies, v2 is the f...

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  3. An electron jumps from the first excited state to the ground stage of ...

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  4. In hydrogen atom, an electron jumps from bigger orbit to smaller orbit...

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  5. A hydrogen atom ia in excited state of principal quantum number n . I...

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  6. In Rutherford scattering experiment, what will b ethe correct angle fo...

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  7. An electron is moving in an orbit of a hydrogen atom from which there ...

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  8. If lamda(1) and lamda(2) are the wavelengths of the first members of t...

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  9. If the electron in the hydrogen atom jumps from third orbit to second ...

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  10. Balmer series of hydrogen atom lies in

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  11. Consider 3rd orbit of He^(+) (Helium) using nonrelativistic approach t...

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  12. What is the wavelength of ligth for the least energetic photon emitted...

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  13. The total energy of an electron in 4th orbit of hydrogen atom is

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  14. In Rutherford's alpha particle experiment with thin gold foil, 8100 sc...

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  15. Consider the spectral line resulting from the transition from n=2 to n...

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  16. If and alpha-paricle of mass m, charged q and velocity v is incident o...

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  17. The energy of an electron in excited hydrogen atom is -3.4 eV . Then, ...

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  18. The radius of the smallest electron orbitin hydrogen like ion is (0.51...

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  19. First Bohr radius of an atom with Z=82 is r. radius its third orbit is

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  20. The ratio of minimum wavelengths of Lyman and Balmer series will be

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