Radiation

• What is the atom mostly made up of

  Empty space
• When electron moves closer to the nucleus what is emitted by the electron

  Electromagnetic radiation
• When an electron moves further from the nucleus what is absorbed by the electrons

  Electromagnetic radiation
• The overall charge of an atom

  0
• Which type of nuclei give out radiation

  Unstable
• What do nuclei give out as they change to become more stable

  Radiation
• What we call the rate at which a radioactive substance decays

  Activity
• Number of decays per second

  Count rate
• To measure the count rate

  GM tube
• 4 types of nuclear radiation

  Alpha,beta, gamma, neutron
• What is an alpha particle

  2 protons, 2 neutrons