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When alpha particles are sent through a ...

When alpha particles are sent through a thin metal foil most of them go straight through the foil because

A

Alpha particles are much heavier than electrons

B

Alpha particles are positively charged

C

Most part of the atom is empty

D

Alpha particles move with high velocity

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The correct Answer is:
C
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AAKASH SERIES-ATOMIC STRUCTURE-Objective exercise - 1
  1. Rutherford's alpha ray scattering experiment showed for the first time...

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  2. The radius of the atom (in cm) is of the order of

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  3. When alpha particles are sent through a thin metal foil most of them g...

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  4. Identify the incorrectly matched set ffrom the following

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  5. Einstein was awarded Noble Prize for

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  6. In electromagnetic radiation, which of the following,…… rays has great...

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  7. Which of the following is not an electromagnetic radiation ?

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  8. A particle revolves round a circular path. The acceleration of the par...

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  9. What is the value of Planck's constant

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  10. Of the following properties of a wave, the one that is independent of ...

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  11. The radiation with highest wave number

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  12. Which of the following relates to photon both as wave motion and as a ...

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  13. Alkali metals used in photoelectric cells

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  14. The energy required to excite the electron from ground state of hydrog...

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  15. Kinetic energy of photoelectrons is independent on-------- of incident...

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  16. Assertain (A): K, Rb and Cs form superoxides. Reason (R) : The stabil...

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  17. If the wavelength of an electromagnetic radiation is 2000 A. what is i...

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  18. The energy of a photon is 3 xx10^(-12)erg.What is its wavelength in nm...

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  19. The frequency associated with photon of radiation having a wavelength ...

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  20. The wave number of the radiation whose quantum is 1 erg is

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