4. Metals are Lustrous (or Shiny), and can be Polished.
For example, gold, silver and copper are shiny metals and they can be polished. The property of a metal of having a shining surface is called metallic lustre (chamak). The shiny appearance of metals makes them useful in making jeweller/ and decoration pieces. For example, gold and silver are used for making jewellery because they are bright and shiny. The shiny surface of metals makes them good reflectors of light. Silver metal is an excellent reflector of light.
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Matter in Our Surroundings - Notes
2. 7. Metals are Solids at the Room Temperature
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4. 3. Non-Metals are Bad Conductors of Heat and Electricity.
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8. 7. Non-Metals may be Solid, Liquid or Gases at the Room Temperature.
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9. 11. Non-Metals Have Many Different Colours.
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15. 8. Metals Generally Have High Melting Points and Boiling Points.
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18. 8. Non-Metals Have Comparatively Low Melting Points and Boiling Points
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23. 1. Non-Metals are Not Malleable. Non-Metals are Brittle.
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24. Effect of Temperature and Pressure on Solubility
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25. To Study the Properties of a Suspension
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26. Chemical Formula for daily use material
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29. Pure Substances : Elements and Compounds
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33. 1. Separation by a Suitable Solvent
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34. 3. Metals are Good Conductors of Heat and Electricity.
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35. 4. Non-Metals are Not Lustrous (Not Shiny). They are Dull in Appearance.
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36. Solutions, Suspensions And Colloids
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43. 6. Metals are Usually Strong. They Have High Tensile Strength.
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46. Differences Between Mixtures and Compounds
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48. Separation Of Mixture Of a Solid And a Liquids
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50. Comparison Among the Properties of Metals and Non-Metals
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