Question

what are the consequenses of lantanoid contraction...

Answer 1

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With an increase in the atomic number, the basic strength of the oxides and hydroxides decreases. This contraction causes a decrease in the size oflanthanide cations and, therefore, the polarizing power of the cations increases. This further decreases the ionic character of the oxides and hydroxides.

Answer 2

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Lanthanide contraction consequences

Due to lanthanide contraction , the ionic size from La 3+ to Lu 3+ along lanthanide series gradually decreases. As a result, the covalent properties of lanthanide metal hydroxide compounds regularly increases [according to Fajan's rule,]from lanthanum to lutetium .

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