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