The early actinoids (such as Neptunium and Plutonium) possess a unique capability to involve an imme — d and f Block Elements Chemistry Question

💡 Solution & Explanation

Unlike Lanthanides (which rarely stray from $+3$), the earlier Actinides exhibit an incredibly wide range of stable oxidation states. Because the $5f$, $6d$, and $7s$ levels are nearly indistinguishable in energy, both Neptunium ($Np$) and Plutonium ($Pu$) forces reach an absolute series maximum of exactly $+7$.