Consider the following statement(s) for actinides (An):
\[ \begin{array}{l} \text{A. Oxidation states greater than +3 are more frequent in An compared to lathanides (Ln)} \\ \text{B. Some An(III) ions show d-d transitions} \\ \text{C. } \mathrm{UO_2^{2+}} \text{ and } \mathrm{PuO_2^{2+}} \text{ are stable} \\ \text{D. Some of actinides do not have radioactive isotopes} \end{array} \]
The correct answer is
(a)A and C
(b)B and D
(c)A, B and C
(d)B, C and D
Answer
Answer: A ✓ checked by 4AB · confidence high
Explanation
Early actinides show oxidation states above +3 far more often than lanthanides, and UO₂²⁺ and PuO₂²⁺ are stable actinyl ions. An(III) show f–f, not d–d, bands, and every actinide is radioactive. A and C (a).