Question

Name an element whose atomic weight was corrected on the basis of their positions in Mendeleev’s periodic table.

Answer 1

Mendeleev's periodic table helped in correction of atomic masses of some of the elements, based on their positions in the periodic table.
For ex: the atomic mass of Beryllium was corrected from 13.5 to 9.0.
Along with Beryllium, there were three more elements whose atomic masses were corrected which included Gold, Platinum and Indium.