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Polarizing power:

Polarising power is the ability of an atom or group of atoms to attract the shared pair of electrons toward itself.

For example: If you have aluminium chloride....

the aluminium ion has a 3+ charge and is relatively small.

The chlorine ion has a 1- charge and is larger than the aluminium ion.

As a result...the aluminium ion has a higher charge density (i.e. a stronger attraction) and so attracts the shared pair of electrons (between the chlorine and aluminium) towards itself. we say aluminium has high polarising power because of its ability to do this. And the chlorine is easily polarised because the electrons get taken away from it.

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βˆ™ 11y ago
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βˆ™ 14y ago

It is the ratio of the charge to the ionic radius.

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Q: What does the term polarising power of a cation mean?
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