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The radius of the Bohr orbit in the grou...

The radius of the Bohr orbit in the ground state of hydrogen atom is 0.5 the radius of the orbit of the electron in the third excited state of `He^(+)` will be

A

8 `A^(@)`

B

`4 A^(@)`

C

`0.5 A^(@)`

D

`0.25 A^(@)`

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-ATOMS-EXERCISE -III
  1. As the electron in Bohr orbit of hydrogen atom passes from state n = 2...

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

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  3. The wavelength of first line of Lyman series in hydrogen atom is 1216 ...

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  4. The ionization potential of H atoms is 13.6 V. The energy difference b...

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  5. The radius of the Bohr orbit in the ground state of hydrogen atom is 0...

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  6. The potential energy of an electron in the fifth orbit of hydrogen ato...

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  7. If R is the Rydberg constant for gydrogen, then the wave number of the...

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

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  9. The ratio of maximum to minimum possible radiation energy in Bohr's hy...

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  10. Frequency of the series limit of Balmer series of hydrogen atom interm...

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  11. Given mass number of gold = 197 , density of gold = 19.7 g cm^(-3) , A...

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  12. Transitions between three energy levels in a particular atom give rise...

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  13. The electron in a hydrogen atom makes a transition from n = n(1) to n...

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  14. An electron revolving in an orbit of radius 0.5 A^(@) in a hydrogen at...

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  15. How many revolutions does an electron complete in one second in the fi...

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  16. If one were to apply Bohr model to a particle of mass 'm' and charge '...

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  17. In hydrogen spectrum the shortest wavelength in Balmer series islambd...

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  18. Orbits of a particle moving in a clrcle are such that the perimeter of...

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  19. Consider 3rd orbit of He^(+) (Helium ) Using non relativistic approach...

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  20. A beam of fast moving alpha particles were directed towards a thin fil...

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