Erin's crossword.

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Across
  1. 2. hold two or more atoms together to form a chemical bond
  2. 6. the row in periodic table
  3. 7. when compound is heated and breaks down into smaller products
  4. 10. non-reactive
  5. 12. have no charge
  6. 14. reactants transform into products
  7. 15. made of two or more that are chemically bonded together
  8. 17. arrangement of element in increasing atomic number
  9. 18. burning of substance in the presence of oxygen
  10. 19. final substance produced after a reaction occured
  11. 20. when a substance reacts with oxygen/oxidising substance
Down
  1. 1. both metal and non metal
  2. 3. fizzing/bubbling/ gas released
  3. 4. substance that can't be broken down into another substance
  4. 5. when the mass stays the same in a chemical reaction
  5. 8. always have a complete outshell
  6. 9. unreactive and in period 1 in periodic table
  7. 11. have the same number of protons but different numbers of neutrons
  8. 13. non-medal but conducts electricity
  9. 16. temperature where substances melt