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Elements, Mixtures And Compounds
Elements, Mixtures And Compounds
Elements, Mixtures And Compounds
Elements, Mixtures And Compounds
Elements, Mixtures And Compounds
Elements, Mixtures And Compounds
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Elements, Mixtures And Compounds

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  • 1. Elements, mixtures and compounds By the end of the lesson you should be able to: <ul><li>Recognise and classify elements, mixtures and compounds </li></ul><ul><li>Recall some chemical symbols </li></ul><ul><li>Write word/symbol equations </li></ul><ul><li>Give some uses of rock salt </li></ul><ul><li>Describe how rock salt is purified </li></ul>
  • 2. Starter <ul><li>Work in pairs </li></ul><ul><li>Sort the cards so into 6 rows. Each row should have in it: </li></ul><ul><ul><li>A picture (at the start) </li></ul></ul><ul><ul><li>A card that says what that picture shows </li></ul></ul><ul><ul><li>A card that explains your choice (at the end) </li></ul></ul><ul><ul><li>e.g. </li></ul></ul>THIS PICTURE IS AN ELEMENT BECAUSE ALL THE ATOMS ARE THE SAME
  • 3. 8E Making marvellous molecules!
  • 4. Word and Symbol Equations <ul><li>An equation is short way of describing a chemical reaction </li></ul><ul><li>E.G. When carbon reacts with oxygen, carbon dioxide is made </li></ul><ul><li>Carbon + Oxygen  Carbon dioxide </li></ul><ul><li>C + O 2  CO 2 </li></ul>Reactants Products
  • 5. Separating Rock Salt Crush Rock Salt Add Water Filter mixture Evaporate Water Salt is left behind
  • 6. Uses of Salt Pure Salt Rock Salt De-icing Roads Electrolysis Food use, dyeing, dishwasher salt, preservatives, bath salts Solvay Process Sodium Carbonate Making glass, soaps, paper, dyes Hydrogen – fuel, making margarine Sodium Hydroxide - making paper, soaps, fibres, detergents Chlorine – killing germs in water, bleaches

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