Some covalently bonded the molecules H2, models and two- and Demo giant covalent substances have very large Cl2, O2, N2, HCl, representations. structures using molecules, such as polymers. H2O, NH3 and molecular model kits. MS 5b CH4. Some covalently bonded Discussion questions: Visualise and represent 2D substances have giant covalent Represent the and 3D including two Why are covalently structures, such as diamond and covalent bonds in representations of bonded substances silicon dioxide. small molecules, 3D objects. so different? in the repeating The covalent bonds in molecules Can oxygen form a units of polymers and giant structures can be polymer? and in part of represented in the following Is a polymer? giant covalent forms: Students research new structures, using a polymers and their line to represent a properties. They single bond. present a 'pitch' to Describe the promote the new limitations of using polymer of their choice. Polymers can be represented in dot and cross, ball the form: and stick, two- and dimensional diagrams to represent where n is a large number. molecules or giant structures. Deduce the molecular formula
Some covalently bonded substances have very large molecules, such as polymers. Some covalently bonded substances have giant covalent structures, such as diamond and silicon dioxide. The covalent bonds in molecules and giant structures can be represented in the following forms: Polymers can be represented in the form: where n is a large number. the molecules H2, Cl2, O2, N2, HCl, H2O, NH3 and CH4. Represent the covalent bonds in small molecules, in the repeating units of polymers and in part of giant covalent structures, using a line to represent a single bond. Describe the limitations of using dot and cross, ball and stick, two- and diagrams to represent molecules or giant structures. Deduce the molecular formula models and two- and representations. MS 5b Visualise and represent 2D and 3D including two representations of 3D objects. Demo giant covalent structures using molecular model kits. Discussion questions: Why are covalently bonded substances so different? Can oxygen form a polymer? Is a polymer? Students research new polymers and their properties. They present a 'pitch' to promote the new polymer of their choice. dimensional