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2 marksHalf-life

CSEC Physics · May/June 2014 · Paper 2 · Question 6(a)(i)

The activity of a Bismuth sample decreases to one-sixteenth of its original activity in 20 days.

Define the term 'half-life'.

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Other parts of this question

  1. 6(a)(ii)Calculate the half-life of Bismuth.[4 marks]
  2. 6(b)State TWO useful applications of radioisotopes and TWO precautions to be taken when handling radioisotopes.[4 marks]
  3. 6(c)Calculate the new mass. [c = 3 × 10⁸ m s⁻¹][5 marks]

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