Question

Choose the statements which are incorrect in the case of Lanthanoids.

• A. Ce\(^{4+}\) is diamagnetic while Sm\(^{3+}\) is paramagnetic.
• B. The atomic size of the transition metals having atomic number greater than 71 are very close to that of the elements above them.
• C. Lanthanoids react with hot water forming water soluble \( \text{Ln(OH)}_3 \) with the liberation of \( \text{O}_2 \).
• D. The general electronic configuration of Lanthanoids is \( (n - 2)f^1_{14}d^0 6s^2 \), where \( n = 6 \).

Hint:

Lanthanoids are known for their similar properties, such as the stable oxidation states and the near-constant atomic sizes among the heavier elements in the series. Pay attention to the common oxidation states and their magnetic properties when analyzing lanthanoids.

Answer 1

The Correct Option is A