Knowing that the chemistry of lanthanoids [Ln] is dominated by its +3 oxidation state, which of the following statements is incorrect?

Question

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

Tardigrade Admin · Accepted Answer

As Ln-III compounds are mostly coloured due to presence of unpaired f electrons [.f-fe-transitions]. are possible

Q. Knowing that the chemistry of lanthanoids [Ln] is dominated by its +3 oxidation state, which of the following statements is incorrect?

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.

Because of the large size of the Ln-III ions the bonding in its compounds is predominantly ionic in character.

As Ln-III compounds are mostly coloured due to presence of unpaired f electrons $[f - f e^{-} t r an s i t i o n s]$ are possible

Q. Knowing that the chemistry of lanthanoids [Ln] is dominated by its +3 oxidation state, which of the following statements is incorrect?

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.

Because of the large size of the Ln-III ions the bonding in its compounds is predominantly ionic in character.

As Ln-III compounds are mostly coloured due to presence of unpaired f electrons [f−fe−transitions] are possible

As Ln-III compounds are mostly coloured due to presence of unpaired f electrons $[f - f e^{-} t r an s i t i o n s]$ are possible