Atoms

    Cards (8)

    • Definition of isotopes.
      Isotopes are atoms of an element with the same number of protons and electrons but different numbers of neutrons.
    • Definition of relative isotopic mass.
      The mass of an atom of an isotope of an element relative to 1/12th the mass of an atom of carbon-12.
    • Definition of relative atomic mass.
      The weighted average mass of an atom of an element relative to 1/12th the mass of an atom of carbon-12.
    • What is the relative mass of a proton ?
      1
    • What is the relative mass of a neutron ?
      1
    • What is the relative mass of an electron ?
      1/1800
    • What is the atomic number made up of ?
      protons
    • What is the mass number made up of ?
      protons and neutrons
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