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Across 5. Frying an egg is this type of reaction. 6. Fractional distillation relies on the fact that the substances you are separating have different ______ ______ (don't leave a space between words) 8. If a base is dissolvable in water it is called this. 9. This method can be used to separate salt from water. 12. A fire needs this to burn. 14. Group 1 on the periodic table are __________. 15. If a lit splint goes 'pop' this gas is present. 16. The name for a horizontal row on the periodic table.

Down 1. The process used to separate dissolved substances that have different colours. 2. The process used for separating an insoluble substance from a liquid. 3. This is the colour of universal indicator when added to calcium carbonate. 4. The name for a vertical column on the periodic table. 7. Chemical symbol for sodium. 10. You can use this to test for carbon dioxide. 11. This is the general term for a substance made from one type of atom. 13. Potassium nitrate results from neutralising this type of acid with potassium hydroxide.