4. Non-Metals are Not Lustrous (Not Shiny). They are Dull in Appearance.
Non-metals do not have lustre (chamak) which means that non-metals do not have a shining surface. The solid non-metals have a dull appearance. For example, sulphur and phosphorus are non-metals which have no lustre, that is, they do not have a shining surface. They appear to be dull. There is, however, an exception. Iodine is a non-metal having lustrous appearance. It has a shining surface (like that of metals).
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Matter in Our Surroundings - Notes
1. 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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19. 8. Non-Metals Have Comparatively Low Melting Points and Boiling Points
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23. To Study the Properties of a Suspension
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24. Chemical Formula for daily use material
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25. Effect of Temperature and Pressure on Solubility
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26. 1. Non-Metals are Not Malleable. Non-Metals are Brittle.
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29. Pure Substances : Elements and Compounds
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31. Solutions, Suspensions And Colloids
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34. 1. Separation by a Suitable Solvent
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38. 3. Metals are Good Conductors of Heat and Electricity.
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42. To Separate the Salt-Water Mixture (or Salt-Solution)
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44. 6. Metals are Usually Strong. They Have High Tensile Strength.
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46. Separation Of Mixture Of a Solid And a Liquids
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47. 4. Metals are Lustrous (or Shiny), and can be Polished.
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49. To Study the Properties of a Compound of Iron and Sulphur
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