Which statement is incorrect with reference to inner transition elements?

Question

Which statement is incorrect with reference to inner transition elements? (A) The oxides of lanthanoids are basic (B) Pm is radioactive element among actinoids (C) The values of ionization enthalpy of actinoids are less than the values of ionization enthalpy of lanthanoids (D) Only in the electronic configuration of lanthanoids like Ce,Gd, Lu the electrons are filled in 5d orbitals

Tardigrade Admin · Accepted Answer

Pm is not actinoids, its a lanthanide

Q. Which statement is incorrect with reference to inner transition elements?

The oxides of lanthanoids are basic

Pm is radioactive element among actinoids

The values of ionization enthalpy of actinoids are less than the values of ionization enthalpy of lanthanoids

Only in the electronic configuration of lanthanoids like Ce,Gd, Lu the electrons are filled in 5d orbitals

Pm is not actinoids, its a lanthanide