|
Author
|
Message
|
![[Post New]](/templates/default/images/icon_minipost_new.gif)
3 Feb 2012 22:29:41 IST
|
|
|
how do to ineffective shelding there is differce in atomic radius as we move down the group.......
|
|
|
|
4 Feb 2012 23:28:27 IST
|
|
|
could you please clarify the question a little more
|
this reply:
0 points
(with 0
in
0
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
5 Feb 2012 19:57:29 IST
|
|
|
its just ..........what is ineffective sheilding?
|
this reply:
0 points
(with 0
in
0
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
5 Feb 2012 21:17:23 IST
|
|
|
Its 'appreciabl electrostatic forc b/w nucleus n outer elctr0ns'
|
this reply:
0 points
(with 0
in
0
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
6 Feb 2012 10:47:09 IST
|
|
|
i didn't get it..........
|
this reply:
0 points
(with 0
in
0
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
6 Feb 2012 12:51:55 IST
|
|
|
Shielding means,the electrostatic f0rc b/w outr electr0ns and nucleus is reduced due to presenc of electr0ns inbetween,whn ths shieldin is les,its calld inefctiv shieldin. . .and electr0static attracti0n is large. . . .ths is only what i remembr
|
this reply:
0 points
(with 0
in
0
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
8 Feb 2012 13:04:53 IST
|
|
|
thankx
|
this reply:
0 points
(with 0
in
0
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
8 Feb 2012 16:59:06 IST
|
|
|
actually ineffective sheliding is caused due filling up of elec. in the d and f orbitals which cannot shield the force f attraction of the nucleus as well as s nd p electrons can. threrefore the value of sigma ranges from 0.3-0.35 for shilding provided by d electrons. it is due to their diffused shape
|
this reply:
0 points
(with 0
in
0
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
12 Feb 2012 09:33:41 IST
|
|
|
If we move down the group the number of proton added is equal to number of electron added so an outer most electron should see same charge at the center. But this does not happen as inner electron of d and f block cannot do not provide same repulsion due to poor screening. Due to this effective central charge increases for outer electrons. This leads to phenomenon like lanthanide contraction.
|
this reply:
0 points
(with 0
in
0
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
16 Feb 2012 20:30:49 IST
|
|
|
thankuuuuuuuuu
|
this reply:
0 points
(with 0
in
0
votes
)
[?]
|
|
You have to be logged on to rate
|
|
|
|
|
Moderation Team
Expert Question:
![[Up]](/templates/default/images/icon_up.gif "[Up]"){kind=icon}
2
