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Knowing that the Chemistry of lanthanoids (Ln) is dominated by its oxidation state, which of the following statements is incorrect?

  1. A
    Because of the large size of the Ln (III) ions the bonding in its compounds is predominantly ionic in character.
  2. B
    The ionic sizes of Ln (III) decrease in general with increasing atomic number.
  3. C
    Ln (III) compounds are generally colourless.
  4. D
    Ln (III) hydroxides are mainly basic in character.

Solution & Step-by-step Explanation

Most lanthanoid (III) ions are coloured in the solid state as well as in aqueous solution due to transitions. The exceptions are and , which have no electrons or completely filled subshells respectively.

Practice this question

Try it yourself before checking the explanation above.

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

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Inorganic ChemistryLanthanoidsOxidation States

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