JEE Main 202118 Mar, Morning shiftChemistryEasyClassification of Elements and Periodicity in Properties127× since 2002
The ionic radius of Na⁺ ions is 1.02 . The ionic radii (in ) of Mg²⁺ and Al³⁺, respectively, are
JEE Main 2021 · 18 Mar, Morning shift · Q1556