Year 8 Chemical Reactions

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Across
  1. 3. part of the atom that is negatively charged
  2. 5. what is the scientific term for burning
  3. 7. One type of atom. Found in the Periodic Table
  4. 10. carbon dioxide released into the environment is a pollutant because it is a __________
  5. 14. In a chemical equation these substances come after the arrow
  6. 15. this type of combustion only produces carbon dioxide and water
  7. 17. All matter are made up of this tiny spheres.
  8. 19. type of elements found on the right of the Periodic Table.
Down
  1. 1. an insoluble solid can be separated from a liquid using this method; e.g. sand mixed with water.
  2. 2. the chemistry word for when something reacts with oxygen
  3. 4. more than one element chemically bonded together
  4. 6. type of elements found on the left and centre of the Periodic table.
  5. 7. a dissolved solid can be separated from a liquid using this method; e.g. salt dissolved in water.
  6. 8. the chemistry word for when something loses oxygen in a reaction
  7. 9. In a chemical equation these substances come before the arrow
  8. 11. this type of combustion produces carbon monoxide and soot particles and is less efficient
  9. 12. Part of the atom in the centre
  10. 13. chemical equations need to be __________ so there is the same number of atoms in the reactants and products.
  11. 16. more than one substance not chemically bonded together
  12. 18. All the elements can be found in The Periodic _______