Periodic Classification of elements In 1866 John Newland proposed his method of classification he arranged elements according to their atomic mass in the ascending order. But after every eight element. The properties were same for example after Lithium, Sodium is the eight element like Hydrogen and ended with thorium. So in total he said there are eight group just like the musical notes and that is why his concept was called new lands Law of Octaves His Points are Elements arranged according to the atomic mass in ascending order Every eight element had same properties. For example Lithium and Sodium Compared with Octave of music at that time 56 element were known Limitation – Only 56 elements and grouped cobalt and nickel with halogens Law Of Octave-The atomic mass of element vanadium with symbol V has 50.9 atomic mass but chromium has 50.2 So actually chromium should came before. Another anomaly was that of cobalt and nickel cobalt atomic mass is 58.93. But that nickel is 58.71, cobalt comes before nickel although his arrangement was in the ascending order to atomic mass. So for that purpose he started hydrogen and ended with Thorium another limitation was that he identified only up to Calcium them we came Geometry ivanovich mend leave. The men leaves periodic table. Now this table was much more organized then pervious efforts.