8. Metals Generally Have High Melting Points and Boiling Points.
This means that most of the metals melt and vaporise at high temperatures. For example, iron is a metal having a high melting point of 1535°C. This means that solid iron melts and turns into liquid iron (or molten iron) on heating to a high temperature of 1535°C. Copper metal has also a high melting point of 1083°C. There are, however, some exceptions. For example, sodium and potassium metals have low melting points (of less than 100°C). Another metal gallium has such a low melting point that it starts melting in hand (by the heat of our body).
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Matter in Our Surroundings - Notes
1. 3. Non-Metals are Bad Conductors of Heat and Electricity.
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3. 7. Metals are Solids at the Room Temperature
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4. The Case of a Liquid Solute Dissolved in a Liquid Solvent
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6. 11. Metals Usually Have a Silver or Grey Colour
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7. 7. Non-Metals may be Solid, Liquid or Gases at the Room Temperature.
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10. 6. Non-Metals are Not Strong. They Have Low Tensile Strength.
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12. Separation Of Mixture Of a Solid And a Liquids
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15. To Study the Properties of a Colloid
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19. To Study the Properties of a Compound of Iron and Sulphur
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20. 11. Non-Metals Have Many Different Colours.
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21. 1. Separation by a Suitable Solvent
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26. 2. Separation by a Separating Funnel
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27. 6. Metals are Usually Strong. They Have High Tensile Strength.
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29. To Distinguish a Colloid from a Solution
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32. 3. Metals are Good Conductors of Heat and Electricity.
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33. Experiment to Obtain Coloured Component (Dye) From Ink
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38. To Study the Properties of a Solution
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42. To Separate the Salt-Water Mixture (or Salt-Solution)
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43. 1. Separation by Fractional Distillation
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46. 1. Non-Metals are Not Malleable. Non-Metals are Brittle.
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49. Chemical Formula for daily use material
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