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(A) electrons int the atom are held due ...

(A) electrons int the atom are held due to coulomb forces.
(R) the atom is stable only because the centripetal force due to coulomb's law is balanced by the centrifugal force .

A

Both 'A' and 'R' are true and 'R' is the correct explanation of 'A'.

B

Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A'

C

'A' is true and 'R' is false

D

'A' is false and 'R' is true

Text Solution

Verified by Experts

The correct Answer is:
C
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AAKASH SERIES-ATOMS-EXERCISE -IB
  1. When an electron of the hydrogen atom jumps from a higher to lower en...

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  2. (A) hydrogen atom consists of only one electron but its emission spect...

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  3. (A) for the scattering of alpha- particles at large angles, only the n...

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  4. Statement-1 : Between any two given energy levels, the number of abosr...

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  5. (A) atoms of each element are stable and emit characteristic spectrum....

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  6. (A) most of the mass of the atom is concentrated in its nucleus. (R)...

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  7. (A) bohr's third postulaate states that the stationary orbits are thos...

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  8. (A) the total energy of an electron revolving in any stationary orbit ...

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  9. (A) in the experiment of alpha particle scattering, extremely thin gol...

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  10. (A) in alpha particle scattering number of alpha paritcle undergoing h...

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  11. (A) electrons int the atom are held due to coulomb forces. (R) the a...

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  12. (A) according to classical electromagnetic theory an accelerated parti...

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  13. Assertion : A laser beam of 0.2 watt power can drill holes through a m...

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  14. Assertion (A) : LASER is used to measure distant object as moon. Re...

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  15. Assertion In He-Nelaser, population inversion takes place between ener...

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  16. Assertion : Crystalline solids can cause Xrays to diffract. Reason...

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  17. A: In beta-decay an electron is emitted by the nucleus R: Electrons ...

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  18. Assertion : X-ray astronomy is possible only from satellites orbiting ...

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  19. According to Bohr's atomic model

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  20. Assertion : Total energy of electron in an hydrogen atom is negative. ...

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