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The speed of an electron in the inner mo...

The speed of an electron in the inner most orbit of the hydrogen (Bohr radius = 52.9 pm, me `= 9.11 xx 10^(-31) kg`) is

A

`2.19 xx 10^(4) m.s^(-1)`

B

`2.19 xx 10^(6) m.s^(-1)`

C

`2.19 xx 10^(7) m.s^(-1)`

D

`2.19 xx 10^(8) m.s^(-1)`

Text Solution

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The correct Answer is:
B
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AAKASH SERIES-ATOMIC STRUCTURE-Objective exercise - 1
  1. Velocity of the electron in the 1st Bohr orbit

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

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

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

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

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  6. Wavelength of the wave associated with a moving electron

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

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

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

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

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

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

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

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

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

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

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  17. If uncertainity in position is zero, the uncertainity in momentum of a...

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  18. Uncertainity inposition of a minute particle of mass 25 g in space is ...

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  19. The uncertainity in momentum of an electron is 1 xx 10^(-5) kg.m//s. T...

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  20. Identify the correct set from the following for fundamental particles ...

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