Bonding, structure and properties: GCSE Chemistry
Ionic, covalent and metallic bonding, states of matter, giant structures and nanoparticles
The short version
Bonding and structure decide melting point, hardness and whether a substance conducts. Giant lattices behave very differently from small molecules.
Key idea
Oppositely charged ions attract (electrostatic force)
Grade 2–3: The metal gives electrons away. The bits then stick because plus and minus attract.
Grade 5–6: I can draw the idea of Na^+ and Cl^− and say high melting point because of strong forces.
Grade 9: Dot-and-cross: outer shell only, brackets and charges. I never draw a line between Na and Cl (that looks covalent). Mark scheme: ions can move, not electrons can move.
Go a bit deeper
Single = one pair; double = two pairs (O2, CO2); triple = three (N2)
Grade 2–3: Non-metals share electrons. Water and oxygen are made of little molecules.
Grade 5–6: I can say shared pair, name a double bond, and say simple molecules do not conduct.
Grade 9: I never write weak covalent bonds for a low boiling point. Outer electrons only on a dot-and-cross. Giant covalent is the other covalent story (next lessons).
Worked example
Worked example
Grade 2–3: The metal gives electrons away. The bits then stick because plus and minus attract. Grade 5–6: I can draw the idea of Na^+ and Cl^− and say high melting point because of strong forces. Grade 9: Dot-and-cross: outer shell only, brackets and charges. I never draw a line between Na and Cl (that looks covalent). Mark scheme: ions can move, not electrons can move.
Lessons in this topic
- Ionic bonding
- Covalent bonding
- Metallic bonding
- States of matter
- Giant structures
- Nanoparticles (Combined depth)
In the app each lesson is video (when we have a real YouTube id) then intro, learn and summary steps.
What the examiner wants
Link structure to property: giant ionic lattices conduct when molten or aqueous; simple molecules have weak intermolecular forces; giant covalent structures have high melting points.
Try these questions
Cover the answers and have a go first. Worked solutions are underneath.
Ionic bonding involves
Solid sodium chloride does not conduct electricity because
A covalent bond is
Methane has a low boiling point because
Common mistakes
- Ionic conduction is moving ions. Metallic conduction is moving electrons. Do not mix them.
- Do not say weak covalent bonds for why methane has a low boiling point. The covalent bonds stay intact — the weak forces between molecules break.
- Ionic solids do not conduct; metals do. The moving particles are electrons in metals, ions in molten ionic compounds.
- Particles do not melt. The substance melts. Particles gain energy and change arrangement.
Answers and working
Frequently asked questions
Is GCSE Bonding, structure and properties on Combined Science and Triple?
Bonding, structure and properties is on Combined Science and on Triple Chemistry. Progress is shared in the ReviseEasy app.
Which exam board is this Bonding, structure and properties page for?
The ideas are board-agnostic for AQA, Edexcel, OCR, WJEC and CCEA. Paper lengths and question numbers differ — check your specification.
Is Bonding, structure and properties Foundation or Higher?
The core ideas appear on both tiers. Higher papers add extra application and some HT-only detail, marked in lessons with a Higher badge.
Learn, try, get feedback, fix the mistake
Open the stepped lesson, then the quiz with hints. Required-practical and calculation questions use the same method you will need in the paper.
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