Question

define dobernier triads

Answer 1

He arranged d elements in increasing order of their atomic weights in groups of 3 called traids in which d atomic weight of d middle element was found to be the average of d atomic weights of d other 2

Answer 2

Ye chapter abhi hua nahi hai................. Yahi khasiyat hai mere school ki gaao mei hai kya karein pata chale ka. Hoga abhi pre board chal rahe hai.............. Braileist