The International Union of Pure and Applied Chemistry has approved the addition of four new elements--temporarily known as 113, 115, 117, and 118--to the periodic table which completes the seventh row.

The periodic table of elements has four new additions which will fill in all the missing gaps of the seventh row. 
According to the International Union of Pure and Applied Chemistry, the body which oversees this activity, the elements that were verified late last year include those numbered 113, 115, 117, and 118. 
While each is currently referenced through a temporary name and symbol, the