1. Reaction between metals and non-metals

2. Reaction of metals with oxygen

3. Reaction of metals with sulphur

4. Silicon Compounds Silica and silicate

5. Silicon Shiny Bluish-grey Brittle metalloid with a high melting point

6. Characteristic

7. Silica – silicon dioxide Sand Quartz

8. Flint – 打火石/燧石

9. Silicate – metal silicate Clay – aluminium silicate Mica – potassium aluminium silicate

10. Silicate – metal silicate asbestos – calcium silicate +magnesium silicate Feldspar – potassium aluminium silicate + sodium aluminium silicate

11. Silicate – metal silicate Silica gel Sodium silicate

12. Coloured silicate Topaz – 黃晶 Jade

13. Coloured silicate Ruby

14. A reactive metal Does not exist in pure form in nature Combine with other elements to form carbonate Calcium compounds

15. Calcium compounds Lime stone Marble

16. Calcium compounds Sea shell Corals

17. Calcium compounds Stalactites Stalagmites

18. Calcium compounds

19. Compound consists of calcium, carbon and oxygen Does not dissolve in water React with acids to form calcium salt, water and carbon dioxide Decompose on strong heating to form calcium oxide(quiclime生石灰) and carbon dioxide Properties of Calcium carbonates

20. Calcium oxidedissolves a little water to form calcium hydroxide (slaked lime熟石灰) - plenty of heat is released - a hissing sound is produced - effervescence(起泡) occurs - calcium oxid swells and break up Properties of Calcium carbonates

21. Solid calcium hydroxide dissolves in water to form calcium hydroxide solution (lime water) Lime water react with carbon dioxide to form calcium carbonate and water (lime water turns chalky) Properties of Calcium carbonates

22. Uses of calcium compounds