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Materials : Metals and Non-Metals

Metals

  • Physical properties
  • Shining surface (in pure state) [called metallic lustre]
  • Generally hard [varies from metal to metal]
  • Malleable [i.e. can be made thin sheets by beating]
  • Ductile [i.e. can be drawn into thin wires]
    • [Gold → Highly ductile]
  • Good conductors of heat
  • High melting point
  • Conduct electricity
  • Produce sound [some metals; these are called sonorous]

Non-metals
  • Non-metals are found in all the three states i.e. solid, liquid and gas, at room temperature.
  • Iodine (non-metal) has lustre
  • Carbon has allotropes (exists in different forms)  
    • Diamond is hard
    • Graphite  (Conducts electricity)

Metals

Non-metals

  1. Generally, these are hard and lustrous.

These are soft and have no lustre.

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