Chemistry revision

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Across
  1. 3. This is made up of only one type of atom.
  2. 4. To separate solids from liquids we used this paper.
  3. 6. Two or more elements chemically bonded together.
  4. 9. To separate the ink from the water we used a technique called....
  5. 11. Most of the periodic table is made up of....
  6. 12. Mg is the symbol for...
  7. 14. When a liquid changes into a solid.
Down
  1. 1. Fe is the symbol for...
  2. 2. This table contains all the known elements.
  3. 5. When a solid is heated, it will....
  4. 6. This kind of change cannot be undone.
  5. 7. This kind of change can be undone.
  6. 8. When a liquid changes into a gas.
  7. 10. O is the symbol for...
  8. 13. When a solid changes into a liquid.
  9. 15. Au is the symbol for...