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Brainlag Learn / GCSE Chemistry

Bonding, structure and the properties of matter

Ionic, covalent and metallic bonding, the structures they make, and how structure explains melting points, conduction and hardness, with nanoparticles for separate Chemistry.

Lessons

  1. Ionic bonding and ionic formulaeMetals give electrons to non-metals, the charges that follow from the group number, dot and cross diagrams, and the formula of an ionic compound. 22 min, with the Periodic Table, free
  2. Ionic lattices and covalent bondsWhy ionic compounds melt so high and conduct only when molten or dissolved, then sharing electrons in covalent molecules. 22 min, free
  3. Simple molecules and polymersWeak forces between molecules, low melting and boiling points, reading the state from data, and why polymers are solids. 22 min, Plus
  4. Giant covalent structures and forms of carbonDiamond, graphite and silicon dioxide, then graphene, fullerenes and nanotubes, and how structure decides hardness, melting point and conduction. 24 min, Plus
  5. Metallic bonding and alloysPositive ions in a sea of delocalised electrons, why metals conduct and bend, and why alloys are harder. 20 min, Plus
  6. NanoparticlesHow small a nanoparticle is, nanometres in standard form, surface area to volume ratios, and the uses and risks of nanoparticles. 20 min, Plus, Chemistry only

Practise and test

AQA, Pearson Edexcel and OCR are registered trade marks of their owners. Brainlag Learn is independent: it is not affiliated with or endorsed by any exam board, and every question on it is original.