S1 Chemical Reactions

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Across
  1. 3. Go along the rows in a periodic table to find a ...
  2. 5. When two or more types of atom are mixed but not chemically joined, a __________ is formed.
  3. 7. Particles have to do this in order for a chemical reaction to happen.
  4. 9. Elements are made up of one type of ______.
  5. 11. Elements are either metals or ...
  6. 13. Elements which share similar chemical properties are in ___________.
  7. 14. This element has the atomic number 16.
  8. 15. If it's not a chemical reaction, it's a _______ change.
  9. 18. Fluorine, chlorine, bromine and iodine are all in this group.
  10. 19. This non-metal element is a liquid at room temperature.
Down
  1. 1. Seeing these tells us that a chemical reaction has occurred.
  2. 2. Increasing this can increase the rate of reaction.
  3. 4. These negatively charged particles are found on the outer shells of an atom.
  4. 6. The periodic table is made up of these.
  5. 8. This element has the symbol K.
  6. 9. The group 1 ________ metals.
  7. 10. This liquid metal was used in thermometers.
  8. 12. He created the periodic table.
  9. 16. These speed up a chemical reaction without getting used up.
  10. 17. When two or more types of atoms are chemically joined, a _____________ is formed.