2nd Year Summer test

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Across
  1. 2. has a pH of 7
  2. 5. made of 2 or more substances mingled together
  3. 7. turns milky white in presence of CO2
  4. 9. made of one type of atom only
  5. 10. separation of white light into its colours
  6. 16. method so see how much acid is needed to neutralise a base
  7. 18. when acid and base react to form salt and water
  8. 19. part of the atom with no charge (neutral)
  9. 22. chips used to make carbon dioxide
  10. 23. part of the atom that orbits the nucleus
  11. 26. made of 2 or more differenrt elements/atoms chemically combined
Down
  1. 1. gas produced when you combine a metal and an acid
  2. 3. unit for measuring current
  3. 4. used in submarines to see above water
  4. 6. slows down the flow of electricity
  5. 8. bouncing of light off a surface
  6. 11. bending of light when it passes from 1 medium to another
  7. 12. unit for measuring voltage
  8. 13. used to disperse light
  9. 14. liquid used to make oxygen
  10. 15. __________ metals group one on the periodic table
  11. 17. has a pH of less than 7
  12. 20. has a pH of more than 7
  13. 21. unit for measuring resistance
  14. 24. flow of electricity
  15. 25. equipment used in a titration to measure the acid
  16. 27. part of the atom with a positive charge