Chemistry

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Across
  1. 1. a substance made up of two or more different elements chemically joined together
  2. 2. a neutral particle made up of protons, neutrons and electrons
  3. 5. the amount of product made in a reaction
  4. 7. a physical method used to separate an insoluble solid from a liquid
  5. 8. the central part of an atom, made up of protons and neutrons
  6. 10. a substance that reacts with acids in neutralisation reactions
  7. 12. an indicator that’s pink in alkalis and colourless in acids
Down
  1. 1. an exothermic reaction between a fuel and oxygen
  2. 3. the process of breaking down a substance using electricity
  3. 4. a substance with a pH of less than 7 that forms H+ ions in water
  4. 6. a charged particle formed when one or more electrons are lost or gained by an atom
  5. 9. the amount by which a given result may differ from the true value
  6. 11. a substance with a pH more than 7 that forms OH- ions in solution