Chemical bonds

4 lessons in Bonding, structure and the properties of matter.

23 exam questions · 43 marks

2.1 Ionic bonding How metal atoms lose electrons and non-metal atoms gain electrons to form ions with full outer shells, drawing dot and cross diagrams for ionic compounds, and working out the numbers of protons, neutrons and electrons in ions. AQA Edexcel OCR 6 questions 2.2 Ionic compounds and their formulae The structure of ionic compounds as giant lattices held by strong electrostatic forces, the strengths and limitations of lattice models, working out formulae from the charges on ions, and the -ide and -ate endings. AQA Edexcel OCR 6 questions 2.3 Covalent bonding How non-metal atoms share pairs of electrons to form covalent bonds, dot and cross diagrams and displayed formulae for common simple molecules, single, double and triple bonds, and the strengths and limitations of each way of representing a molecule. AQA Edexcel OCR 6 questions 2.4 Metallic bonding and the properties of metals Metallic bonding as positive ions in a sea of delocalised electrons, how it explains the high melting points, conductivity and malleability of metals, and why alloys are harder than pure metals. AQA Edexcel OCR 5 questions