Y9 Chemistry

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Across
  1. 4. A vertical column in the periodic table.
  2. 8. A neutral solution has a pH of _______.
  3. 10. A reaction that releases energy to the surroundings.
  4. 13. A positively charged subatomic particle.
  5. 14. Method used to separate substances based on their solubility.
  6. 18. Method used to separate two liquids based on their boiling points.
  7. 19. The reaction between an acid and a base.
Down
  1. 1. Two or more substances not chemically bonded.
  2. 2. Group 7 elements are called ________.
  3. 3. The centre of an atom.
  4. 5. This is used to test pH by colour change.
  5. 6. What is transferred during chemical reactions?
  6. 7. Method used to separate an insoluble solid from a liquid.
  7. 9. A substance made up of two or more elements chemically bonded together.
  8. 11. A horizontal row in the periodic table.
  9. 12. Reaction involving oxygen that releases energy.
  10. 15. A reaction that takes in energy from the surroundings.
  11. 16. Substances with a pH less than 7.
  12. 17. A substance made up of only one type of atom.
  13. 19. Group 0 elements are known as ______ gases.