Which of the following is/are deduced from the Rutherford's scattering experiment? (1) There are neutrons inside the nucleus. (2) The sign of the charge of the nuclei is the same as the sign of alpha particles. (3) Electrons are embedded in the nucleus.
  • (1) only
  • (2) only
  • (3) only
  • (1) (2) and (3)
In scattering, the impact parameter b is defined as the:
  • maximum kinetic energy of the scattering projectile
  • distance of closest approach between projectile and target
  • closest distance between projectile and target if there were no deflection
  • distance between projectile and target for which there is maximal deflection
The alpha particle scattering experiment was carried out by:
  • J. Chadwick
  • Rutherford
  • Goldstein
  • J.J. Thomson
We know that the Rutherford model of the atom is superior to the Thompson model because when alpha particles are scattered from atoms:
  • the deflected angle is always large
  • they are usually observed with kinetic energy between 5 and 10 MeV
  • some alpha particles are deflected to large angles
  • the deflected angle is usually small
In Rutherford's experiment, a thin gold foil was bombarded with alpha particles. According to Thomson's "plum-pudding" model of the atom, what should have happened?
  • All the alpha particles would have been deflected by the foil.
  • All the alpha particles should have bounced straight back from the foil.
  • Alpha particles should have passed through the foil with little or no deflection.
  • Alpha particles should have become embedded in the foil.
The distance of closest approach when a 15.0 MeV proton approaches gold nucleus (Z = 79) is
  • 758 fm
  • 7.58 fm
  • 75.8 fm
  • 0.758 fm
The targets used in the alpha particle atomic experiments in the early 1900's was:
  • metal foils
  • alpha particles
  • radioactive sources
  • gold foil
Rutherford's experiments on scattering of alpha particles proved that:
  • atoms contain electrons
  • number of positive charges is equal to the number of negative charges
  • atom is mostly empty
  • positive charge is uniformly distributed in the atom
Number of alpha particles N scattered at an angle θ during Rutherford's alpha scattering experiment is :
61.png
  • A
  • B
  • C
  • D
0 h : 0 m : 1 s

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