Radioactivity

• Radioactivity is a totally ... process - fill in the gap

  random
• What is half-life used for?

  To make predictions
• How can radiation be measured?

  Using a Geiger-muller tube and counter
• What part of the atom does radiation come from?

  Nucleus
• What is half-life?

  The time taken for the number of radioactice nuclei in an isotope to halve
• What is activity measured in?

  Becquerels (Bq)
• Activity never...

  reaches zero
• How would you find half-life on a graph?

  Find the time (x axis) taken for the acitivity (y axis) to half
• What is beta radiation?

  A high speed electron
• What does ionising radiation do?

  Mutates genes
• What is an alpha particle?

  • Helium nucleus
  • 4He2