Chemistry: Ions

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  • Noble gases are very unreactive. 
  • ----> they all have a full outer electron shell. This makes the atom stable. 

(http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20101/bio%20101%20lectures/chemistry/sodium%20atom,%20chlorine%20atom.gif)

When sodium chloride (NaCl) is formed, one electron from sodium is transferred to chlorine.

(http://faculty.clintoncc.suny.edu/faculty/michael.gregory/files/bio%20101/bio%20101%20lectures/chemistry/sodium%20ion,%20chloride%20ion.gif)

Opposite charges attract each other. 

e.g. Na+ ions and Cl- ions attract…

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