The creation and three important expansions of periodic table of elements——commemorating the 150^th anniversary of Mendeleev's periodic table

This year marks the 150^th anniversary of the first publication of the periodic table of elements by Mendeleev. Here, the historical events about the discovery of the "Periodic Law" and the creation of "Periodic Table of Elements" are briefly reviewed. Three important expansions of the periodic table are specifically described: the discovery of "Natural Occurring Radioactive Elements", the synthesis of "Man-Made Elements", and the synthesis of "Superheavy Elements". The current periodic table has 118 confirmed elements in which only contained 63 elements in 1869. Furthermore, the prediction of the "Island of Stability" for superheavy elements and the edge of the periodic table are discussed.