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What are atoms made of

Atoms Molecules Ions Chemical Equations On-line practice


  1. An atoms is made up of a nucleus and one or more electrons.
  2. The nucleus is the centre of the atom and it consists of neutrons and protons.

                         [Image: Atom Description Graphic]


  1. From the diagram above, we can see that :
bulletthe electrons are negatively charged
bulletthe protons are positively charged
bulletthe neutrons has no charge
  1. The electrons move around the nucleus in a random motion and the region where electrons are most likely to be found is called an orbital or electron cloud.  (The maximum number of electrons in a shell is given by the formula 2n2 , where n is the number of electron shells.)
  2. An atom has no charge because it contains the same number of protons and electrons.


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