Reaction Between Metals And Non Metals

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  • Metalloid – an element with both the metal and non-metal properties

Transcript

  • 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