Knowing that the Chemistry of lanthanoids (Ln) is dominated by its +3 oxidation state, which of the following statements in incorrect
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The ionic sizes of Ln (III) decrease in general with increasing atomic number.
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Ln (III) compounds are generally colourless.
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Because of the large size of the Ln (III) ions, the bonding in its compounds is predominantly ionic in character
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Ln (III) hydroxides are mainly basic in character.