GCSE Chemistry: Ionic, Covalent and Metallic Bonding

Ionic, covalent and metallic bonding are the three ideas that explain why every substance behaves the way it does, and GCSE examiners test them both as definitions and as explanations of properties. This quiz does the same.

The formation questions establish the three mechanisms cleanly: electron transfer from metal to non-metal for ionic bonds, shared pairs for covalent bonds, and the lattice of positive ions in a sea of delocalised electrons for metals. Ion prediction gets a dedicated question — Group 2 forming 2+ and Group 7 forming 1− ions — plus a spot-the-element question identifying which element forms a 2− ion, testing the group-to-charge logic rather than memorised examples. Dot-and-cross diagrams are covered conceptually: what the dots and crosses actually represent (outer electrons from different atoms), the understanding behind the drawing skill.

The properties half of the quiz is where the marks usually live. You will connect giant ionic lattices to high melting points and to conductivity only when molten or dissolved, explain why simple covalent molecules have low melting points (weak intermolecular forces, not weak covalent bonds — the single most-tested distinction in this topic) and why they never conduct, and link metallic bonding to conductivity, malleability and ductility through the delocalised electrons and sliding layers.

Every question is self-contained and each explanation spells out the "because" chain from structure to property — exactly the reasoning pattern that six-mark bonding questions demand on the real paper. The set pairs directly with the Structure and Properties quiz in this collection, which extends the same logic to diamond, graphite, graphene and alloys.

• Describe how ionic, covalent and metallic bonds form
• Predict the ions formed by elements in Groups 1, 2, 6 and 7
• Interpret dot-and-cross reasoning for covalent and ionic substances
• Explain the properties of ionic compounds, including when and why they conduct
• Distinguish weak intermolecular forces from strong covalent bonds when explaining melting points

Topic scope follows the Department for Education's GCSE combined science subject content, bonding, structure and properties strand: ionic, covalent and metallic bonding, ion formation by group, and linking bonding type to bulk properties.