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Radius of tenth Bohr orbit of the Hydrog...

Radius of tenth Bohr orbit of the Hydrogen atoms is

A

0.53 Å

B

5.3 Å

C

53 Å

D

`5.3 xx 5 Å`

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The correct Answer is:
C
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Show that the circumfernce of the Bohr orbit for the hydrogen atom is an integral multiple of the de-Broglie wavelength as-sociated with the electron revolving around the orbit .

The gravitational attraction between electron and proton in a hydrogen atom is weaker than the coulomb attraction by a factor of about 10^(-40) . An alternative way of looking at this fact is to estimate the radius of the first Bohr orbit of a hydrogen atom if the electron and proton were bound by gravitational attraction. You will find the answer interesting.

AAKASH SERIES-ATOMIC STRUCTURE-Objective exercise - 1
  1. What are the postulates of Bohr's model of hydrogen atom ? Discuss the...

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  2. Splitting of spectral lines under the influence of strong magnetic fie...

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  3. Radius of tenth Bohr orbit of the Hydrogen atoms is

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  4. Radius of 3rd Bohr orbit is

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  5. Velocity of the electron in the 1st Bohr orbit

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  6. The energy that is needed to remove an electron from the 1st Bohr orbi...

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  7. The speed of an electron in the inner most orbit of the hydrogen (Bohr...

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  8. The energy of an electron present in Bohr's second orbit of hydrogen a...

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  9. The de-Broglie equation treats an electron to be

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  10. Wavelength of the wave associated with a moving electron

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  11. The uncertainity principle and the concept of wave nature of matter we...

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  12. Bohr's postulate that mv r = (nh)/(2pi) is proved mathematically by

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  13. The momentum of a particle of wave length 1 Å is

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  14. The de Broglie wavelength of a particle with mass 1 g and velocity 100...

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  15. The de Broglie wave length of a riffle bullet of mass 2 grams moving w...

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  16. A cricket ball of mass 0.5 kg is moving with a velocity of 100 ms^(-1)...

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  17. If the Planck's constant h = 6.6 xx 10^(-34) Js, the de-Broglie wave l...

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  18. The de Broglie wave length associated with a particle of mass 1 mg mov...

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  19. The de Broglie wavelength of a tennis ball of mass 60 g moving with a ...

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  20. The de Broglie wavelength associated with a ball of mass, 200g and mov...

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