Radioactivity

    Cards (17)

    • What is meant by radioactive decay?
      It is the process of unstable nuclei giving out radiation.
    • How many types of nuclear radiation are there?
      Four types
    • What are isotopes?
      Atoms of the same element with different neutrons.
    • Why do some isotopes undergo radioactive decay?
      To become stable by emitting radiation.
    • What is the symbol for activity in radioactive decay?
      Bq
    • How is activity measured?
      In becquerels (Bq), as decays per second.
    • What device is used to measure the activity of a radioactive source?
      Geiger-Müller tube
    • What is the count rate in radioactivity?
      Number of decays recorded each second.
    • What is the difference between count rate and activity?
      Count rate includes background radiation effects.
    • What is an alpha particle composed of?
      Two protons and two neutrons.
    • What is the relationship between an alpha particle and a helium atom?
      An alpha particle is the nucleus of helium.
    • What is a beta particle?
      An electron ejected from the nucleus.
    • How is a beta particle formed?
      When a neutron changes into a proton and electron.
    • What type of radiation is a gamma ray?
      A type of electromagnetic radiation.
    • What is the fourth type of radiation emitted by unstable nuclei?
      A neutron
    • What are the four types of nuclear radiation?
      • Alpha particles
      • Beta particles
      • Gamma rays
      • Neutrons
    • What are the key points about radioactive decay?
      • Unstable nuclei emit radiation
      • Process is random and unpredictable
      • Measured in becquerels (Bq)
    See similar decks