Monotomic Elements

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Monatomic Elements


There is evidence for very weak forces of attraction, between the atoms of the noble gases (group 0). These atoms exist singly so they are called ‘monatomic’.


When neon is cooled to -249oC it turns from a gas into a solid with the atoms arranging in a regular lattice. The only for holding them together are Van der Waals forces. If it weren’t for these forces it would be impossible to turn a liquid into a solid. When heated to -246oC (+3oC) neon turns into a gas. This is a very small amount of heat energy, showing the bonds are very weak.


Explanation for Van  der Waals forces: 


W - VAN DER WAALS FORCES are the electrostatic attractions between temporary dipole (momentary slight charge on an atom due


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