Define matter

Anything that has mass and occupies space is called matter. A matter is made up of tiny particles. These particles are invisible to a naked eye. The following are the characteristics of matter:

  • Particles have space between them
  • Particles are continuously moving
  • Particles attract each other

Based on the intermolecular forces of attraction and spacings between the particles matter is broadly classified into three categories:

  • Solids: These are tightly packed because of strong intermolecular forces. Example: Book
  • Liquids: The molecules in a liquid are closely packed due to weak intermolecular forces. Example: Water
  • Gases: The intermolecular forces Present between them are negligible. Example: Oxygen

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