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# Mendeleev's periodic table lists elements in the order of

$\begin{array}{1 1}(A)\;\text{Atomic numbers}\\(B)\;\text{Atomic weights}\\(C)\;\text{Number of neutrons}\\(D)\;\text{Dates of discovery}\end{array}$

Mendeleev's periodic table lists elements in the order of atomic weights
Hence (B) is the correct answer.