ChemistryMediumHigh School (11–12)The d- and f-Block Elements › Lanthanoids and Actinoids (f-Block)NEETA-LevelIB
Created by StemPy LabAssertion (A): aqueous solutions of scandium(III) salts are colourless. Reason (R): the ion has no electrons in the subshell.
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← Statement I: in aqueous solution, Ce⁴⁺ acts as an oxidising agent. Statement II: in aqueous solution, Eu²⁺ acts as a reducing agent. Which choice is correct?Assertion (A): zirconium and hafnium are very hard to separate. Reason (R): the lanthanoid contraction gives these two atoms almost the same radius. →
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