Question

Atomic weight of which set of elements were corrected by Mendeleev?

• A. $Li,Na,K$
• B. $U,Be,In$
• C. $Tc,Sc,Al$
• D. None of the these

Answer 1

The correct option is B $U,Be,In$

Mendeleev corrected atomic weights of Uranium, Beryllium, and Indium ($U,Be,In$) based on their positions in the periodic table. Along with that he also corrected the atomic weights of Gold ($Au$) and Platinum ($Pt$).

Options $B$ is correct.