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5 marksRadioactivity

CAPE Physics Unit 2 · 2016 · Paper 2 · Question 6(c)

Cobalt-60 has a half-life of 5.27 years. Beginning with an initial sample of 200 grams of pure Co-60, determine how many grams of nickel would be found after three years. Neglect the mass equivalence of the energy in the radiated decay products.

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  1. 6(a)Describe the Geiger–Marsden experiment and discuss the evidence it provides for the nuclear model of the atom.[8 marks]
  2. 6(b)Cobalt-60 is obtained by irradiating natural Cobalt-59 with fast neutrons, then emits a beta particle to form nickel. (Atomic numbers: \text{Co} - 27,…[2 marks]

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