Question:
The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from +3 oxidation state?
The most common oxidation state of Lanthanoid elements is +3. Which of the following is likely to deviate easily from +3 oxidation state?
Updated On: Mar 21, 2025
- Ce(At. No. 58)
- La (At. No. 57)
- Lu (At. No. 71)
- Gd(At. No. 64)
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The Correct Option is A
Solution and Explanation
The correct answer is (A): Ce(At. No. 58)
Explanation:
Ce → [Xe]4f1 5d1 6s2
Ce+4 → [xe] 4f° 5d° 6s°
Cerium in +4 oxidation state acquires inert gas configuration.
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Concepts Used:
P-Block Elements
- P block elements are those in which the last electron enters any of the three p-orbitals of their respective shells. Since a p-subshell has three degenerate p-orbitals each of which can accommodate two electrons, therefore in all there are six groups of p-block elements.
- P block elements are shiny and usually a good conductor of electricity and heat as they have a tendency to lose an electron. You will find some amazing properties of elements in a P-block element like gallium. It’s a metal that can melt in the palm of your hand. Silicon is also one of the most important metalloids of the p-block group as it is an important component of glass.
P block elements consist of:
- Group 13 Elements: Boron family
- Group 14 Elements: Carbon family
- Group 15 Elements: Nitrogen family
- Group 16 Elements: Oxygen family
- Group 17 Elements: Fluorine family
- Group 18 Elements: Neon family