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Intros
Lessons
  1. Introduction to isotopes
  2. What is an isotope?
  3. Why does Cl have atomic mass of 35.5?
  4. Definition of relative atomic mass and relative isotopic mass.
  5. Calculating relative atomic mass
  6. (IB) How do we detect isotopes?
  7. (IB) Uses of isotopes.
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Examples
Lessons
  1. Use the number of particles to identify elements, and use elements to determine number of particles.
    Complete the table below. When writing the chemical symbol, write the mass number, and charge on the particle with it.
    identify elements, and use elements to determine number of particles
    1. Calculate relative mass of elements using relative abundance of their isotopes.
      Use the data on relative abundance of the following isotopes to find the molar mass of a sample of these elements.
      1. 84^{84}Sr 0.56%,86, ^{86}Sr 9.86%,87, ^{87}Sr 7%,88, ^{88}Sr 82.58%
      2. i) 107^{107}Ag 51.84%,109, ^{109}Ag 48.16%
        ii) 35^{35}Cl 76%,37, ^{37}Cl 24%