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astatine, bromine, caesium, chlorine, fluorine, francium, iodine, lithium, sodium, potassium, rubidium. ，Making sure you keep notes and tables of your findings and research carry out investigations into:  •the physical properties, of the elements, e.g. boiling points, melting points, electrical conductivity, thermal conductivity, solubility in water and non-polar solvents, viscosity•	 
•	the chemical properties of the elements in group 7, e.g. the displacement reactions between the group 7 elements and halide salts •	the electronic structure of the elements of group 1 and 7. ，Now you must use the information you have collected to produce the support materials, result tables, leaflet, or poster, for the new technicians which: •	Describes the physical and chemical properties of the elements in each group. Uses the physical properties to classify the elements as belonging to either group 1 or 7. •Describes at least one chemical trend (pattern) and at least one physical trend for each of the groups 1 and 7

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