Dmitri Mendeleev, one of the greatest teachers of his time, was a Russian chemist born in Tobolsk, Siberia in the year 1834. He is well know for his work on the periodic table, therefore, he was named “Father of the Periodic Table. Mendeleev anticipated Andrew’s concept of the critical temperature of gases. He investigated the thermal expansion of liquids and the nature and origin of petroleum. “Mendeleev was one of the first modern-day scientists in that he did not rely solely