Radioactivity

Question 1

Explain which radiation and length of half-life is suitable for tracer in medicine.

Answer 1

1. Not alpha - strongest ionising power -> causes most damage in the body
2. Long half-life - stay in the body for a long time
   - Gamma and short half-life does not stay in body

Question 2

What is half-life?

Answer 2

Time taken for half of the atoms in a radioisotope to decay