Yr 9 Chemistry half term 1 0.0 / 5 ? ChemistryAtoms and compoundsWater hardness and solubilityGCSEAQA Created by: 15JORDKCreated on: 03-11-18 14:43 What is an element? One type of atom. They are all found on the periodic table. 1 of 7 What is a compound? Two or more types of atom which are CHEMICALLY BONDED. 2 of 7 What is a mixture? A mix of elements and/or compounds which are NOT CHEMICALLY BONDED 3 of 7 What are the 4 main techniques for seperating mixtures? Filteration, Evaporation, Chromatography and Distilation 4 of 7 What is distillation? The process that is used to seperate liquids that have different boiling points. 5 of 7 What is Chromatiography ideal for and why? It is ideal for separating dyes in inks because the different dyes will wash through the paper at different rates. 6 of 7 What if the formula to calculate the Rf value? Rf value= distance moved by the centre of the spot ÷ distance moved by the solvent front 7 of 7
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