Nuclear Physics

Worked examples (12)extended set

• 1Reading a model of a lithium atom
• 2What changes when an atom becomes an ion?
• 3Two isotopes of chlorine
• 4Which observation shows the nucleus is massive?
• 5Three alpha-particle paths
• 6Identify the particle from a bar chart
• 7Why is one isotope of iodine radioactive?
• 8Identify the particle released
• 9Fusion of two deuterium nuclei
• 10Nuclei on a proton–neutron grid
• 11Finding the missing fission fragment
• 12Results from a scattering experiment

Model answers (6)

• ✓Model answer — Paper 2/4 short-answer style
• ✓Model answer — Paper 2/4 style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 extended-response style

Worked examples (12)extended set

• 1Choosing the precautions that really reduce exposure
• 2Identifying the radiations from an absorber experiment
• 3Completing a β-decay equation
• 4An α-emitter used inside the body
• 5Following a nucleus through a decay chain
• 6α, β and γ between charged plates
• 7Which way is the magnetic field?
• 8Half-life from a curve that still includes background
• 9Background count and a reading several half-lives later
• 10Choosing the radiation for a thickness gauge
• 11When should an ageing source be replaced?
• 12Nuclei decayed, nuclei remaining

Model answers (6)

• ✓Model answer — Paper 2/4 short-answer style
• ✓Model answer — Paper 2/4 style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 structured style
• ✓Model answer — Paper 4 extended-response style
• ✓Model answer — Paper 4 multi-part structured style