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7 marksRadioactivity

CAPE Physics Unit 2 · 2010 · Paper 2 · Question 3(a)

Radioactive decay of Radon-220.

Describe how to accurately measure the half-life of Radon-220, an α-emitter with a short half-life easily separated from its powdered solid parent, detailing required apparatus, procedure, and data processing.

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Other parts of this question

  1. 3(b)(i)Calculate how many α-particles would be emitted by a 4 mg sample of ²²⁰₈₆Rn in 108 seconds.[5 marks]
  2. 3(b)(ii)A laboratory is deemed safe after a Radon-220 leak when the activity decreases to less than 0.1% of its original value. Calculate the MINIMUM number of minutes…[3 marks]

More practice: the rest of this paper · more Radioactivity questions · all CAPE Physics Unit 2 past papers