1.What were the limitations of Dobereiner’s classification ? 2.What were the limitations of Newlands’ law of octaves ? 3.What were the criteria used by Mendeleev in creating his Periodic Table ? 4.Name two elements you would expect to show chemical reactions similar to magnesium. What is the basis for your choice ? 5.How does the electronic configuration of an atom relate to its position in the Modern Periodic Table ? 6.Compare and contrast the arrangement of elements in Mendeleev’s Periodic Table and the Modern Periodic Table.