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 on his own work but rather was in correspondence with scientists around the world in order to receive data that they had collected. He then used used their data along with his own data to arrange the elements according to their properties" (p.1, NM). .
Mendeleev is best known for his work on the Periodic Table and Periodic Law. Earlier in his scientific career, he sensed that there should be some type of order to the elements. Therefore, he put all of the known elements in order by atomic number expecting the elements in the same group to have the same properties as they did in Newlands' table. However, he found this unsuccessful. So, he furthered his study deciding that there must be elements out there that had not been discovered yet, and that that was the reason that the properties did not line up properly. Mendeleev continued creating a card for each of the 63 known elements. Each card had the elements symbol, atomic weight, and chemical and physical properties. .
From this table, Mendeleev developed the Periodic Law. He published a work known as The Relationships of the Properties of the Elements to their Atomic Weights. The Periodic Law stated that the physical and chemical properties of the elements are periodic functions of their atomic numbers. In other words, when the elements are arranged in order of increasing atomic number, elements with similar properties appear at regular intervals.