A-level Chemistry/OCR (Salters)/Open-Book Paper

How to create diagrams Diagrams are invaluable for conveying precise chemical information without encroaching on the word count. For two-dimensional diagrams such as skeletal formulae or flow charts, a molecule editor is your best bet. For images of three-dimensional molecules, use molecular graphics software, such as Accelrys DS Visualizer, a free downloadable application for Windows. A tutorial on how to use DS Visualizer is available here. 2001 Article 1: From Accident to Design: the progress of poly(ethene) Discovery of poly(ethene) Development of industrial production of poly(ethene) Discovery of Ziegler-Natta catalysts Article 2: Shaping up: the story of poly(propene) /Stereochemistry in poly(propene)/ Development of Ziegler-Natta catalysts /Discovery and development of metallocene catalysts/ Exemplar response An exemplar response to the 2001 open paper exam is available here.