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3 marksAtomic Mass

CAPE Physics Unit 2 · 2006 · Paper 1 · Question 7(a)

Radioactive decay of Thorium-232 and Radium-228.

Complete the nuclear equations for the alpha decay of Thorium-232 to Radium-228 and the beta decay of Radium-228 to Actinium.

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  1. 7(b)(i)Derive an expression for the radius R of the circular path of a particle with mass m and charge q travelling at speed v perpendicular to a uniform magnetic…[3 marks]
  2. 7(b)(ii)An alpha particle and a beta particle move at the same speed perpendicular to the same magnetic field. If the radius of the alpha particle's path is 0.40 m,…[3 marks]
  3. 7(c)Explain why the deflection diagram shown in Figure 9 is unrealistic.[1 mark]

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