Question

Which of the following statements is/are correct for the Lanthanoids?

• A. The 4f electrons do not take part in bonding
• B. The 4f electrons can neither be removed to produce ions nor be made to take part in crystal field stabilization of complexes
• C. The 4f electrons in the antepenultimate shell are very effectively shielded by the 5s and 5p electrons
• D. All of the above

Answer 1

The correct option is D All of the above

All the statement given in statements , A , B and C are correct, regarding Lanthanoids. Hence D option can be opted, i.e. All of these are correct.
AS A: The 4f electrons do not take part in bonding.
B: The 4f electrons can neither be removed to produce ions nor be made to take part in crystal field stabilization of complexes.
C: The 4f electrons in the antepenultimate shell are very effectively shielded by the 5s and 5p electrons.