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Atoms Molecules Ions Chemical Equations On-line practice



  1. All non-living matter is made up of elements.

  1. An element is further made up of countless minute particles called atoms.

  2. An atom is therefore the smallest particle of an element.  

  3. Each element is made up of its own type of atoms.  Therefore, the symbol for an atoms is the same as the symbol for the elements.

  4. Atoms of the same element have the same size and mass while that of the different elements have different sizes and masses.

  5. Atoms are represented by spheres or circles of different sizes.


What are atoms made of ] Structure of atom ] Representing atoms ] Electron arrangement in atom ] Isotopes ]