Radioactivity and Particles (Unit 7)

• What is an Isotope?

  An isotope of an element is a different form of an element with the same chemical properties but different physical properties due to different number of neutrons in their Nuclei
• Alpha Decay is of which Nuclei?

  Helium Nuclei (He)
• What is the Nucleon Number?

  The number of Protons and Neutrons in an Atom
• What is Half-Life? 


  Half life is the interval of time required for one half of the atomic nuclei of a radioactive sample to decay spontaneously to other nuclei
• What type of Nuclei does Half-Life take place in (Stable Nuclei or Unstable Nuclei)

  Half life takes place only in Unstable Nuclei
• What is Another Name for the Nucleon Number?

  The Atomic Mass
• What is the Atomic Number? 


  The Atomic Number is the amount of protons in an element.
• What is Activity of a Radioactive sample measured in?

  Becquerel (Bq)
• What does one Becquerel Represent?

  One Becquerel Represents one decay per second