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Why is electron supposed to be revolving...

Why is electron supposed to be revolving around the nucleus?

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Because if they are stationary they will fall into nucleus due to electrostatic attraction and the atom will be unstable.
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MODERN PUBLICATION-ATOMS -Revision Exercise (Very Short )
  1. In Rutherford scattering experiment, if a proton is taken instead of a...

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  2. The angular momentum of the alpha- particles which are scattered throu...

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  3. Why is electron supposed to be revolving around the nucleus?

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  4. The total energy of eletcron in the ground state of hydrogen atom is -...

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  5. In which region of electromagnetic spectrum, Lyman and Balmer series o...

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  6. What is the maximum number of spectral lines emitted by a hydrogen ato...

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  7. When is H(alpha) line of the emission spectrum of hydgrogen atom obtai...

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  8. What are stationary waves?

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  9. State Bohr's quantisation condition?

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  10. With increasing member, the energy difference between adjacent levels ...

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  11. The energy of an electron in the nth Bohr orbit of hydrogen atom is

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  12. The short wavelength limits of Lyman, Paschen and Balmer series in the...

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  13. The velocity of electron in first orbit of H-atom as compared to the v...

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  14. What is the value of Rydberg constant?

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  15. Write an expression for Bohr's radius in hydrogen atom.

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  16. Write an empirical relation for the Balmer series of hydrogen atom.

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  17. What are the values of first and second excitation potential of hydrog...

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  18. Name the spectral series of hydrogen atom, which be in infrared region...

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  19. The radius of innermost electron orbit of a hydrogen atom is 5.3xx10^(...

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  20. Write the Bohr's frequency condition.

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