9.2.7—Suggest the types of chemical bonding present
- Syllabus
- 9701–2028–2029
- Objective
- 9.2.7
- Level
- AS
Use bonding type to infer the properties of Period 3 compounds
Period 3 compounds can contain ionic, simple covalent or giant covalent structures. The bonding type predicts melting point, conductivity, solubility and reaction behaviour when combined with particle mobility.
Name the structure first, then explain the property through the dominant attraction and whether charged particles or electrons can move.
NaCl has an ionic lattice and conducts when molten; SiO₂ is a giant covalent network with a high melting point; Cl₂ is a simple molecular substance with weak intermolecular forces.
The word “compound” does not imply a single structure type. Compare the actual particles and network before predicting a property.
ConceptA-Level CAIE Chemistry AS