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TGL2:
Structure and melting point
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LINKS |
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Notes on ‘Giant structures’
Apart from a melting point well above room temperature, lead
and salt are quite different in their other properties. For
example, a lump of lead conducts electricity but a lump of
salt does not. These differences are due to differences in
the bonding.
There are just a few examples of giant structures where the
bonds are weak: mercury, for example.
Notes on ‘melting points’ bar chart
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Students should
notice that the melting points are low compared to those
of giant structures. Only wax is above room temperature
and is not very high. |
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Also, the melting
points seem to go up with size, that is, the number
of atoms in a molecule. Oxygen (with the smallest molecules)
is the lowest and wax (with the biggest molecules) is
the highest.
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Science Enhancement Programme CD-ROM 2005 |
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user
guide |
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