ionic character (fajan's rule) nature AlBr and NaBr?
1) AlBr > NaBr
2) AlBr < NaBr
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Covalent character developed in an ionic compound may be determined by fajan’s rule. According to this rule covalent character is more , when :
a) Ions have high charge i.e cation has greater positive charge and anion has greater negative charge.
b) Cation has small ionic radius.
c) Anion has large ionic radius.
d) Compounds of cation having s2,p6,d10 configuration of outer most shell are largely covalent as compared to cation having the same size and charge but outer electronic configuration of s2p6 type.
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