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The ratio of radii of the first three Bo...

The ratio of radii of the first three Bohr orbits is

A

`3:2:1`

B

`1:2:3`

C

`9:4:1`

D

`1:4:9`

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CHETANA PUBLICATION-Structure of atoms and nuclei-EXERCISE
  1. The energy of an electron in the 2nd orbit is -3.4 eV. So the energy o...

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  2. The ionisation potential of H2 atom is

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  3. The ratio of radii of the first three Bohr orbits is

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  4. The radius of first Bohr orbit is 0.53 A^@. The value of n if the radi...

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  5. The relation between force acting on the electron and principle quantu...

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  6. The unit of Rydberg's constant is

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  7. The shortest wavelength of Balmer series is given by

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  8. The longest wavelength in Paschen series is obtained when an electron ...

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  9. The Lyman series involves

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  10. In an atom, two electrons move around the nucleus in circular orbits t...

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  11. The energy in the ground state of hydrogen atom is -13.6 eV, then ener...

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  12. The De Broglie wavelength associated with a particle of mass m and vel...

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  13. In which of the following systems will the radius of the first orbit o...

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  14. The radius of the 4th orbit of the electron will be smaller than its 8...

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  15. In the spectrum of hydrogen atom which transition will yield longest w...

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  16. Which of the following properties of a nucleus does not depend on it...

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  17. If the number of nuclei in a radioactive sample at a given time is N, ...

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  18. The volume of the nucleus is proportional to

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  19. What is the relation between the radius of the nucleus and the mass nu...

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  20. The nucleus having same mass number is called

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