IUPAC announced addition of Four Elements to complete Seventh row of Periodic Table

On 30 December 2015, the International Union of Pure and Applied Chemistry (IUPAC) announced discovery and assignment of elements with atomic number 113, 115, 117 and 118. The decision was taken by the IUPAC as the four elements met the discovery of elements of IUPAP/IUPAC Transfer-mium working group (TWG) 1991 Discovery Criteria. All these four elements are synthetic in nature. They were discovered by scientists belonging to USA, Russian and Japan and complete 7^th row of the periodic table of the elements. Also these four elements are the first to be added to the table since2011, when elements 114 (Flerovium, FI) and 116 (Livermorium, LV) were added.