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    I read on a note book that the polarizing power of a cation decreases down the group.So down the group, is the compound more covalent or ionic? But if that is the case how does it apply to group 1 metal if we say that down the group the polarizing power decreases as a result the compound is more ionic? NaCl for example?
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    (Original post by Sunethra)
    I read on a note book that the polarizing power of a cation decreases down the group.So down the group, is the compound more covalent or ionic? But if that is the case how does it apply to group 1 metal if we say that down the group the polarizing power decreases as a result the compound is more ionic? NaCl for example?
    Hi! I moved this to the Chemistry forum for you - you're more likely to get a good answer here
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    As you go down a group, the ionic radius will increase. So, for the group 1 metals, all of which form +1 cations, the charge density decreases. If the positive charge of the cation is spread over a larger area, its ability to perturb an anions electron cloud is reduced. This leads to a less polar bond, which is the same as a more covalent bond. So an example from group 1, LiCl is more ionic than NaCl or KCl.
 
 
 
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