Choose the Best Answer · Q15
Q.Which of the following oxidation states is most common among the lanthanoids?
a) +4
b) +2
c) +5
d) +3
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Concept understanding — Oxidation States of Lanthanoids
The dominant, universal oxidation state of every lanthanoid is +3. A few lanthanoids also show +2 or +4, each traceable to the extra stability of a half-filled (f⁷) or fully-filled (f¹⁴) configuration: Gd³⁺ (4f⁷) and Lu³⁺ (4f¹⁴) are already stable exac …
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