Lesson 5.2.1.4

5.2.1.4 Covalent bonding Quiz: AQA Combined Science, Unit 9

20 questions

Written by Revision Ninja · Last reviewed 11 October 2026

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Lesson 5.2.1.4, Covalent bonding: 20 multiple choice questions for the AQA GCSE Combined Science (8464), Unit 9: Bonding, structure, and the properties of matter, written with Revision Ninja.

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The 20 questions

  1. What is formed when atoms share pairs of electrons?

    • Covalent bond
    • Ionic bond
    • Metallic bond
    • Hydrogen bond

  2. Covalently bonded substances may consist of:

    • Ionic lattices only
    • Small molecules
    • Metallic lattices only
    • Free ions only

  3. How can common substances made of small molecules be recognised?

    • Chemical formula
    • Electrical conductivity
    • Melting point
    • Density value

  4. Which of these is a giant covalent structure?

    • Diamond
    • Hydrogen
    • Water
    • Methane

  5. Which of these is a polymer?

    • Water
    • Poly(ethene)
    • Sodium chloride
    • Diamond

  6. What does the letter n represent in a polymer chemical formula?

    • Large number
    • Neutron count
    • Nuclear charge
    • Atomic number

  7. Which of these is NOT one of the molecules students must draw with dot and cross diagrams?

    • Ammonia
    • Hydrogen chloride
    • Water
    • Diamond

  8. Single covalent bonds in molecules and giant structures can be represented by:

    • A cross only
    • A dashed circle
    • An arrow
    • A line between atoms

  9. How many covalent bonds does a water molecule (H₂O) contain?

    • 3
    • 2
    • 4
    • 1

  10. How many shared pairs of electrons are in an ammonia molecule (NH₃)?

    • 2
    • 3
    • 1
    • 4

  11. How many shared pairs of electrons are in a methane molecule (CH₄)?

    • 3
    • 2
    • 8
    • 4

  12. How many shared pairs of electrons are in a nitrogen molecule (N₂)?

    • 6
    • 3
    • 1
    • 2

  13. Which molecular formula matches a molecule with 2 carbon and 6 hydrogen atoms?

    • C₂H₄
    • C₂H₆
    • CH₃
    • C₆H₂

  14. How many oxygen atoms is each silicon atom bonded to in silicon dioxide?

    • Four
    • Six
    • Two
    • Three

  15. How many shared electron pairs are in hydrogen chloride (HCl)?

    • 0
    • 3
    • 2
    • 1

  16. In a chlorine molecule (Cl₂), how many electrons does each chlorine atom contribute to the bond?

    • One
    • Zero
    • Seven
    • Two

  17. What type of bonding is present in water molecules?

    • Covalent
    • Electrostatic
    • Metallic
    • Ionic

  18. Every atom is joined by single bonds to four neighbours in a 3D lattice. What structure is this?

    • An ionic lattice
    • A giant covalent structure
    • A simple molecule
    • A metallic giant structure

  19. Which substance has a formula that suggests a small molecule?

    • Sodium chloride (NaCl)
    • Diamond (C)
    • Silicon dioxide (SiO₂)
    • Oxygen (O₂)

  20. Are covalent bonds within small molecules strong or weak?

    • Variable
    • Weak
    • Strong
    • Negligible

All AQA Combined Science quizzes