Ioni character of Lih, Nah, Csh order?

Question

anonymous · Answer

http://answers.yahoo.com/question/index?qid=20100719140125AAjljXK http://yougems.reflectionsinfos.com/queries/viewquery/5100 these say two different things. I agree with the the first link, keeoing in mind fajans rule.. http://en.wikipedia.org/wiki/Fajans'_rules

anonymous · Answer

@chmvijay

chmvijay · Answer

humnn i will be back!!

anonymous · Answer

Alright.

anonymous · Answer

@shubhamsrg

anonymous · Answer

Smaller the Size of Cation more Polarising power So More Covalent Character..hence the order

Li < Na < Cs

shubhamsrg · Answer

ionic char. inc down the group.

anonymous · Answer

I dont know what i was thinking. Increases down the group seems to be following fajans rule now, right?
This is what is written in my book...
The ionic character of hydrides decreases from Li to Cs. The reason being that as the size of the cation decrases, the anion hydride can polarize the cation more easily. As a result covalent character increases and hence ionic character decreases. 
What do you thnk?

anonymous · Answer

And ionic character of hydrides of Nitrogen group would be Nh3<Ph3<.... so on
And of oxygen group. H2o<h2s<... so on, right??

anonymous · Answer

@Yahoo!  ?

anonymous · Answer

@shubhamsrg

shubhamsrg · Answer

I guess ?

anonymous · Answer

electronegativity decreases down the group. so electronegativity differences decreases down the group. so shouldnt ionic character decrease?

anonymous · Answer

@chmvijay ?

anonymous · Answer

batao yaar.... :/

chmvijay · Answer

LiH<NaH<CsH

chmvijay · Answer

Tthe electronegative  character decreases down the gp

chmvijay · Answer

therefore there ionic character increases down the group!!!

shubhamsrg · Answer

the ans : http://answers.yahoo.com/question/index?qid=20080725232901AARwjSN

anonymous · Answer

Answer?

shubhamsrg · Answer

the guy there explains your query well.. nahi ?

anonymous · Answer

So in this case we have H with a low electronegativity right?

shubhamsrg · Answer

H is common among all, and H is more electro-ve than Na, Cs or Li ..

anonymous · Answer

are answer bta do mereko ek baari. fir mai sochta rahunga.

shubhamsrg · Answer

Cs ka electro-vity least hai Na,Cs aur Li me,to sabse zyada diff isi me hoga
hence order
CsH > NaH > Lih

anonymous · Answer

To iska matlab O ki electronegativity max hai to h2o<h2s hi hoga.. Hmm. Ab samajh aaya. Thank you.

shubhamsrg · Answer

arre haan! 
:P

shubhamsrg · Answer

maine bhi ye chiz just abhi abhi sikhi! ^_^
thanks to you :')

anonymous · Answer

ek second. aise jan kehte ho ki Cs ki electronegativity least hai. to difference kaise zyaada hoga? 
stupid question i know. :(

shubhamsrg · Answer

electro-vity to regularly decrease karti hai down the group !

anonymous · Answer

oh ho. kya kr rha hun mai. ok ok. thank you again.