The development of the model of the atom

Alpha particle scattering can be demonstrated using a thin gold foil.

Which statement about this demonstration is not true?

What was deduced or observed in the Rutherford scattering experiment?

The diagram shows the path of a proton being deflected by the nucleus of an atom. Point P is the position of the proton when it is closest to the nucleus.

What is not true about the proton along its path at P ?

Figure 11 shows alpha particles all travelling in the same direction at the same speed. The alpha particles are scattered by a gold (¹⁹⁷₇₉Au) nucleus. The path of alpha particle 1 is shown.

State the fundamental force involved when alpha particle 1 is scattered by the nucleus in Figure 11.

Draw an arrow at position X on Figure 11 to show the direction of the rate of change in momentum of alpha particle 1

Suggest one of the alpha particles in Figure 11 which may be deflected downwards with a scattering angle of 90°

Justify your answer.

Alpha particle 4 comes to rest at a distance of 5.5 × 10⁻¹⁴ m from the centre of the

Calculate the speed of alpha particle 4 when it is at a large distance from the nucleus. Ignore relativistic effects.

mass of alpha particle = 6.8 × 10⁻²⁷ kg

The nuclear radius of¹⁹⁷₇₉Au is 6.98 × 10⁻¹⁵ m.

Calculate the nuclear radius of¹⁰⁷₄₇Ag.

All nuclei have approximately the same density.

State one conclusion about the nucleons in a nucleus that can be deduced from this fact.