How is the modern periodic table different from the one created by Mendeleev?
The modern periodic table contains more elements than the one created by Mendeleev because more elements have been discovered, this is not a significant difference however. The main difference between Mendeleev’s periodic table and the modern periodic table is that Mendeleev’s was arranged in order of increasing atomic mass and the modern periodic table is arranged in order of increasing atomic number. This corrects the few inconsistencies found in Mendeleev’s table.
