Atomic masses

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  • Created by: Amy Mc
  • Created on: 20-02-15 16:41

1. What is relative formula mass, Mr?

  • the weighted mean mass of an atom of an element compared with 1/12 of the mass of an atom of C-12
  • the weighted mean mass of a formula unit compared with 1/12 of the mass of an atom of C-12
  • the weighted mean mass of a molecule compared with 1/12 of the mass of an atom of C-12
  • the mass of an atom of an isotope compared with 1/12 of the mass of an atom of C-12
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Other questions in this quiz

2. What is relative molecular mass?

  • the weighted mean mass of a formula unit compared with 1/12 of the mass of an atom of C-12
  • the weighted mean mass of an atom of an element compared with 1/12 of the mass of an atom of C-12
  • the weighted mean mass of a molecule compared with 1/12 of the mass of an atom of C-12
  • the mass of an atom of an isotope compared with 1/12 of the mass of an atom of C-12

3. What is relative atomic mass, Ar?

  • the weighted mean mass of an atom of an element compared with 1/12 of the mass of an atom of C-12
  • the weighted mean mass of a molecule compared with 1/12 of the mass of an atom of C-12
  • the weighted mean mass of a formula unit compared with 1/12 of the mass of an atom of C-12
  • the mass of an atom of an isotope compared with 1/12 of the mass of an atom of C-12

4. What is relative isotopic mass?

  • the mass of an atom of an isotope compared with 1/12 of the mass of an atom of C-12
  • the weighted mean mass of a formula unit compared with 1/12 of the mass of an atom of C-12
  • the weighted mean mass of a molecule compared with 1/12 of the mass of an atom of C-12
  • the weighted mean mass of an atom of an element compared with 1/12 of the mass of an atom of C-12

5. What isotope has been chosen as the international standard for the measurement of relative mass?

  • N-14
  • C-12
  • H-1
  • O-16

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