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PHYSICAL PROPERTIES OF METALS

PHYSICAL PROPERTIES OF METALS

  • Metals are generally hard.
  • The hardness varies from metal to metal.
  • Metals, in their pure state, have a shining surface.
  • This property is called metallic luster.
  • Some metals can be beaten into thin sheets.
  • This property is called malleability.
  • Gold and silver are the most malleable metals.
  • The ability of metals to be drawn into thin wires is called ductility.
  • Gold is the most ductile metal.

Note-

  • A wire of about 2 km length can be drawn from one gram of gold.
  • It is because of their malleability and ductility that metals can be given different shapes according to our needs.
  • metals are good conductors of heat and have high melting points.
  • The best conductors of heat are silver and copper.
  • Lead and mercury are comparatively poor conductors of heat.

Note- the wires that carry current in your homes have a coating of polyvinyl chloride (PVC) or a rubber-like material.

ELECTRIC WIRE USED IN HOME HAVE PVC COATING
ELECTRIC WIRE USED IN HOME HAVE PVC COATING
  • metals have high melting points but gallium and cesium have very low melting points. These two metals will melt if you keep them on your palm.
  • All metals except mercury exist as solids at room temperature.
  • ┬áThe metals that produce a sound on striking a hard surface are said to be sonorous.
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