Ch17 - Elements, Compounds, Mixtures

• Element - a substance that cannot be split by chemical means and only contain one type of atom

  Compound - a substance made of two or more elements that have chemically bonded/contain two different types of atoms. Ex) water

  Mixtures - consists of two or more substances that have mingled with each other but not chemically combined
• Experiment - making a mixture of iron and sulfur

  1. Weigh out the iron and sulfur
  2. Use a mortar and pestle to grind the two
  3. The iron-sulfur mixture can be separated with a magnet
  4. Heating the mixture, a chemical reaction, forms a compound known as iron sulfide or FeS.
  5. The compound now cannot be separated with a magnet.