A-LevelPhysicsParticle physics9702/22 · Feb/Mar 2020 · Q75 Marks
State and explain whether a neutron is a fundamental particle.
- (a)State and explain whether a neutron is a fundamental particle.[1]
- (b)(i)A proton in a stationary nucleus decays. State the two leptons that are produced by the decay.[2]
- (b)(ii)Part of the energy released by the decay is given to the two leptons. State two possible forms of the remainder of the released energy.[2]
Mark scheme
Marking points from the official mark scheme (Feb/Mar 2020). The mark or mark type is shown in brackets.
- B1 made up of quarks (so) not a fundamental particle
- B1 beta plus / β⁺ (particle)
- B1 (electron) neutrino / v(e)
- B1 kinetic energy of nucleus
- B1 gamma / γ radiation
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