Question

What property was used by Mendeleev to classify the elements

Answer 1

He mostly used the atomic mass which is incorrect.Modern periodic tables are based on atomic number (the number of protons) to determine where the elements are located on the periodic table.Using the periodic table, you can classify the elements in many ways. One useful way is by metals, nonmetals, and metalloids. Most of the elements on the periodic table are classified as metals.