BON Cov bonding ele - Contents
- Page 1Introduction - ReviewIntroduction to the idea that a covalent bond is a shared electron pair using as examples the molecules of non-metals and developing the theory for the bonding of two hydrogen atoms to form H2
- Page 2Problem - ReviewUsers drag and drop hydrogen atoms which are various distances apart onto positions on a potential energy (Morse) curve to illustrate the energy changes that accompany bonding
- 4 marksPage 3ReviewIntroduction to the concept of using models to explain experimental phenomena and to the basics of a bonding model. The involvement of valence electrons in bonding is emphasized along with electron dot diagrams of various non-metal atoms.
- Page 4Questions - ReviewThree examples where users chose from various electron dot diagrams, the electron dot diagram appropriate for a given atom
- 1 marksPage 5Valence electron diagram Cl
- 1 marksPage 6Valence electron diagram N
- 1 marksPage 7ReviewExpanding the model of covalent bonding by introducing the idea that the number of covalent bonds that a particular atom forms can be predicted from the number of unpaired electrons on that atom in its ground state electron configuration
- Page 8Questions - ReviewThree examples where users are asked to predict the type of bond between elements in diatomic molecules based on the number of unpaired electrons at that atom
- 2 marksPage 9Single bond?
- 1 marksPage 10Triple bond?
- 1 marksPage 11ReviewThis highlights that multiple bonding is restricted to bonds containing one of carbon, nitrogen and oxygen and gives the composition of the elemental form of sulfur and phosphorus
- Page 12Questions - ReviewTwo pages that focus on the nature of the bonding for elemental sulfur and phosphorus
- 3 marksPage 13Elemental sulfur
- 3 marksPage 14ReviewExpanding the bonding model to involve all valence electrons in bonding to account for the existance of the graphite and diamond forms of carbon
- Page 15Question - ReviewCorrelating the number of bonds formed by carbon with given structures of diamond and graphite
- 1 marksPage 16C valence electron diagram
- 3 marksPage 17Graphite and diamond