P2 6.5 Half-Life

HideShow resource information
View mindmap
  • Half-Life
    • Radioactivity can be measured using the count rate from it
    • The radioactivity of a sample decreases over time
      • How quickly the count rate falls to nearly zero depends on the isotope
      • Some take a few minutes, whilst others take millions of years
    • We use the idea of half-life to measure how quickly the radioactivity decreases
      • It is the time taken for the count rate from the original isotope to fall to half its initial value
      • It can also be described as the time it takes for the number of unstable nuclei in a sample to halve
    • The half-life is the same for any sample of a particular isotope

Comments

No comments have yet been made

Similar Physics resources:

See all Physics resources »See all Radioactivity resources »