Which period of modern periodic table is told to be incomplete and why

Asked by saradamahapatra9999 | 18th Feb, 2019, 11:24: AM

Expert Answer:

The seventh period of the periodic table was considered incomplete.
Because most of the elements from group seven are identified in labs and their properties have not been studied properly. 
Also, these elements are unstable and very less information is available of these elements

Answered by Varsha | 18th Feb, 2019, 12:10: PM