Time management is very much important in IIT JAM. The eduncle test series for IIT JAM Mathematical Statistics helped me a lot in this portion. I am very thankful to the test series I bought from eduncle.
Nilanjan Bhowmick AIR 3, CSIR NET (Earth Science)
Krishna kant Chaudhari
Numbers of valence electron of Os = 8 numbers of electron donated by PMe3 =2 Number of electron donated by N = 3 Number of electron donated by. NMe2= 3 Number of electron donated by two Br= 2 1 electron due to negative charge. =1 Hence total number of electron =19 Hence it doesn't follow 18 electron rule.