Question

Although $+3$ is the characteristic oxidization state for lanthanoids but cerium also shows $+4$ oxidation state because?

• A. it has variable ionization enthalpy
• B. it has tendency to attain Nobel gas configuration
• C. it has a tendency to attain $f^0$ configuration
• D. it resembles $P{b}^{4+}$

Answer 1

Answer: (B), (C)

The correct options are
B it has tendency to attain Nobel gas configuration
C it has a tendency to attain $f^0$ configuration