Radioactive decay

    Cards (15)

    • What is the central part of an atom called?
      Nucleus
    • What particles are contained in the nucleus?
      Protons and neutrons
    • What is the plural of nucleus?
      Nuclei
    • What is the relative charge of a neutron?
      0
    • What is the relative mass of a neutron?
      1
    • What is the relative charge of a proton?
      +1
    • What is the relative mass of a proton?
      1
    • How many neutrons and protons does stable carbon-12 have?
      6 protons and 6 neutrons
    • What happens as the number of protons increases in an element?
      More neutrons are needed for stability
    • How many protons does lead-206 have?
      82 protons
    • How many neutrons does lead-206 have?
      124 neutrons
    • What is radioactive decay?
      Unstable atomic nuclei break apart, releasing radiation
    • What is radiation?
      Energy carried by particles from a radioactive substance
    • What happens to nuclei with too many or too few neutrons?
      They are unstable and will decay
    • How does the stability of an atom's nucleus depend on the number of neutrons?
      It must have a certain amount for stability
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