Chemistry

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Across
  1. 2. The vertical columns in the periodic table are known as...
  2. 6. The change of state from a gas to a liquid
  3. 10. A solution with a pH value less than 7
  4. 12. The horizontal rows in the periodic table are known as...
  5. 13. Halogens tend to be very ...
  6. 15. An example of an exothermic reaction
  7. 17. The middle block of the periodic table is called the...
  8. 18. What substance do acids need to to give their typical acid reactions?
  9. 19. A reaction with oxygen to release energy
  10. 20. Fluorine gas is an example of a ...
Down
  1. 1. Alkalis contain... (ions)
  2. 3. The gain of oxygen
  3. 4. An acidity or alkalinity of a substance can be shown using an...
  4. 5. An example of an endothermic reaction
  5. 6. A gas that turns limewater cloudy
  6. 7. The change of state from solid to gas
  7. 8. The number of bonds that can form
  8. 9. Gives oxygen to another substance
  9. 11. Group 1 metals get ... reactive down the group
  10. 14. A substance that speeds up a reaction
  11. 16. Acids contain... (ions)