3. Metals are Good Conductors of Heat and Electricity.
This means that metals allow heat and electricity to pass through them easily. Metals are generally good conductors of heat (The conduction of heat is also called thermal conductivity). Silver metal is the best conductor of heat.It has the highest thermal conductivity. Copper and aluminium metals are also very good conductors of heat. The cooking utensils and water boilers, etc., are usually made of copper or aluminium metals because they are very good conductors of heat. The poorest conductor of heat among the metals is lead. Mercury metal is also a poor conductor of heat.
Metals are good conductors of electricity. The metals offer very little resistance to the flow of electric current and hence show high electrical conductivity. Silver metal is the best conductor of electricity. Copper metal is the next best conductor of electricity followed by gold, aluminium and tungsten. The electric wires are made of copper and aluminium metals because they are very good conductors of electricity. The metals like iron and mercury offer comparatively greater resistance to the flow of current, so they have lower electrical conductivity.
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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. The Case of a Liquid Solute Dissolved in a Liquid Solvent
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5. 7. Metals are Solids at the Room Temperature
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6. 11. Metals Usually Have a Silver or Grey Colour
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8. 7. Non-Metals may be Solid, Liquid or Gases at the Room Temperature.
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11. Separation Of Mixture Of a Solid And a Liquids
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12. 6. Non-Metals are Not Strong. They Have Low Tensile Strength.
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14. To Study the Properties of a Compound of Iron and Sulphur
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16. To Study the Properties of a Colloid
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19. 11. Non-Metals Have Many Different Colours.
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22. 1. Separation by a Suitable Solvent
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24. To Distinguish a Colloid from a Solution
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27. 6. Metals are Usually Strong. They Have High Tensile Strength.
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28. To Study the Properties of a Solution
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32. 2. Separation by a Separating Funnel
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34. Separation of Mixture Of Two Solids
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35. 3. Metals are Good Conductors of Heat and Electricity.
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37. 1. Non-Metals are Not Malleable. Non-Metals are Brittle.
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41. 1. Separation by Fractional Distillation
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