Question 1

• A

• B

• C

• D

Question 2

• A

• B

• C

• D

Question 3

• 267

• 261

• 160

• 154

A thin gold foil is bombarded with α-particles as shown.

The results of this experiment provide information about the

• binding energy of a gold nucleus.

• energy levels of electrons in gold atoms.

• size of a gold nucleus.

• structure of a gold nucleus.

Isotopes of a given element all have the same

• charge / mass ratio.

• neutron number.

• nucleon number.

• proton number.

Which statement about the alpha-particle scattering experiment provides evidence for the existence of the nucleus?

• A tiny proportion of the alpha-particles are deflected through large angles.

• Slower alpha-particles are deflected through larger angles.

• The kinetic energies of the deflected alpha-particles are unchanged.

• The number of alpha-particles deflected depends on the thickness of the foil.

Which statement describes β^- decay in terms of a simple quark model?

• A down quark changes to an up quark and emits an electron and an electron antineutrino.

• A down quark changes to an up quark and emits a positron and an electron neutrino.

• An up quark changes to a down quark and emits an electron and an electron antineutrino.

• An up quark changes to a down quark and emits a positron and an electron neutrino.

Which row gives the correct classification of protons, electrons, and neutrinos?

• A

• B

• C

• D

Which equation represents β⁺ decay?

• neutron → proton + positron + antineutrino

• neutron → proton + positron + neutrino

• proton → neutron + positron + antineutrino

• proton → neutron + positron + neutrino

What is a proton?

• hadron

• a particle consisting of two down quarks and one up quark

• a positive fundamental particle

• a positive lepton