Students could analyse data of The four types of crystal structure and the bonding January 2006 Unit 1 unknown compounds/substances structure: Ionic, metallic, present. Q6 and relate this to structure type. macromolecular (giant January 2005 Unit 1 covalent), molecular. Explain the energy changes Q5a associated with changes of January 2003 Unit 1 The structures of the state. Q1e June 2004 Unit 1 following crystals as Q6a examples of these four Draw diagrams to represent types of crystal these structures. structure: diamond, graphite, ice, iodine magnesium, sodium chloride. 3.1.3.5 0.6 Explain the shapes of, and Students predict and draw the June 2011 Unit 1 Q3 RSC exercise on VSEPR theory: Shapes of simple weeks bond angles in, simple shapes of familiar and unfamiliar January 2010 Unit 1 molecules and ions. molecules and ions with up molecules. Q6 to six electron pairs June 2013 Unit 1 Q5 Deduce the shape of (including lone pairs of Students use balloons to June 2006 Unit 1 familiar and unfamiliar electrons) surrounding the demonstrate shapes of molecules. Q5b examples of species central atom. June 2005 Unit 1 Q4 according to valence January 2013 Unit 1 shell electron pair Q6 repulsion (VSEPR) principles. 3.1.3.6 0.2 Use partial charges to show Practical activity: deflecting jets. January 2013 Bond polarity. weeks that a bond is polar. Unit 1 Q3 bonds and Explain why some June 2004 electronegativity. molecules with polar bonds Unit 1 Q6a
The four types of crystal structure: Ionic, metallic, macromolecular (giant covalent), molecular. The structures of the following crystals as examples of these four types of crystal structure: diamond, graphite, ice, iodine magnesium, sodium chloride. structure and the bonding present. Explain the energy changes associated with changes of state. Draw diagrams to represent these structures. Students could analyse data of unknown compounds/substances and relate this to structure type. January 2006 Unit 1 Q6 January 2005 Unit 1 Q5a January 2003 Unit 1 Q1e June 2004 Unit 1 Q6a 3.1.3.5 Shapes of simple molecules and ions. Deduce the shape of familiar and unfamiliar examples of species according to valence shell electron pair repulsion (VSEPR) principles. 0.6 weeks Explain the shapes of, and bond angles in, simple molecules and ions with up to six electron pairs (including lone pairs of electrons) surrounding the central atom. Students predict and draw the shapes of familiar and unfamiliar molecules. Students use balloons to demonstrate shapes of molecules. June 2011 Unit 1 Q3 January 2010 Unit 1 Q6 June 2013 Unit 1 Q5 June 2006 Unit 1 Q5b June 2005 Unit 1 Q4 January 2013 Unit 1 Q6 RSC exercise on VSEPR theory: 3.1.3.6 Bond polarity. bonds and electronegativity. 0.2 weeks Use partial charges to show that a bond is polar. Explain why some molecules with polar bonds Practical activity: deflecting jets. January 2013 Unit 1 Q3 June 2004 Unit 1 Q6a