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Combined science (AQA Higher)
Calculations involving masses

Starter quiz

  • The relative atomic mass for this element is <span class="blank">______</span>.
    The relative atomic mass for this element is ______.
    • '63' ✓
  • Match each keyword to the correct description.
    • element
      ⇔
      a substance made up of only one type of atom ✓
    • compound
      ⇔
      two more or elements chemically bonded together ✓
    • ion
      ⇔
      a particle with an electrical charge due to the gain/loss of electrons ✓
    • molecule
      ⇔
      a particle consisting of two or more atoms joined by covalent bonds ✓
    • diatomic
      ⇔
      two atoms chemically bonded together ✓
  • Which of the following formulae are for substances that contain ionic bonds?
    • SiO₂
    • CO₂
    • NaBr  ✓
    • CH₄
    • Fe₂O₃  ✓
  • Which formulae indicate substances that are simple molecular in structure?
    • CaO
    • P₂O₅  ✓
    • LiF
    • H₂  ✓
    • H₂O  ✓
  • The chemical formula for sodium bromide is ______.
    • 'NaBr' ✓
  • The relative formula mass of magnesium chloride, MgCl₂, is ______.
    • '94' ✓
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