What does this ratio indicate :-¯Mw/¯Mn
Answers
Heya...!!!!
If you go logicall Mw is the weighted average and Mn is the number average. Take Mn as you balls moving inside the neck bottle in which you are only concerned about the number of balls moving and in case of Mw you are concerned about the size of balls moving irrespective of size of the balls. So i am not able to think logically and mathematically also there are discrepancies.
The stability of hydrides decreases from ammonia to bismuthine. This is because the central atom E increases in size down the group. With the increase in the size of the central atom, the E – H bond becomes weaker. where E is nitrogen ,phosphorus, arsenic,antimony , bismuth.
With the increase in size, the overlapping between the orbitals of E and hydrogen will not be effective. This accounts for the decrease in the stability of hydrides as we move down the group