Sodium Chloride

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Sodium chloride (NaCl) is an ionic compound made of sodium (Na) and chlorine (Cl). It is used everyday in the food industry as a salt to preserve food and intensify flavour. [1]
  1. http://www.wellcome.ac.uk/Education-resources/Education-and-learning/Big-Picture/All-issues/Food-and-diet/Food-for-thought/WTDV031528.htm
[1] It is also naturally occuring and found in large quantities in the sea or underground. [2]
  1. http://www.wellcome.ac.uk/Education-resources/Education-and-learning/Big-Picture/All-issues/Food-and-diet/Food-for-thought/WTDV031528.htm
  2. http://www.sciencedaily.com/articles/s/seawater.htm
[1]

The ionic bond between the two elements is formed when the sodium atom loses one of its 11 electrons from its outer shell to become the cation Na+, now with 10 electrons and the chlorine atom accepts this electron becoming the anion Cl- now with 18 electrons. Sodium readily loses the electron from its outer shell as a full outer shell is more stable. Chlorine accepts this electron to gain a full outer shell, also to gain a more stable noble gas structure. The resulting ions have opposite charges and so are strongly electrostatically attracted to each other, causing the ionic bond.

This bond can then attract more sodium and chlorine ions, creating a large ionic lattice where ions of opposite charges surround each other. Millions of ions come together forming ionic bonds from multiple different directions and a rigid structure is produced. [2]
  1. http://www.sciencedaily.com/articles/s/seawater.htm
  2. http://www.chemguide.co.uk/atoms/bonding/ionic.html
[1]
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