n+1 rule

This forum made possible through the generous support of SDN members, donors, and sponsors. Thank you.

GRAD

Member
10+ Year Member
Joined
Jul 10, 2006
Messages
387
Reaction score
0

Members don't see this ad.
which of the following subshells will fill first?

use the n+1 rule and explain

5d
5f
6s
4f
6d
 
J

jackbauer!

which of the following subshells will fill first?

use the n+1 rule and explain

5d
5f
6s
4f
6d

6s....i dunno what this n+1 rule is you speak of....but just by looking at the periodic table you can tell that the answer is 6s.....

jb!:)
 

Streetwolf

Ultra Senior Member
10+ Year Member
7+ Year Member
Joined
Oct 25, 2006
Messages
1,801
Reaction score
7
which of the following subshells will fill first?

use the n+1 rule and explain

5d
5f
6s
4f
6d
Actually it's n+L right?

s = 0
p = 1
d = 2
f = 3

So

5d = 5 + 2 = 7
5f = 5 + 3 = 8
6s = 6 + 0 = 6
4f = 4 + 3 = 7
6d = 6 + 2 = 8

Since 6 is the lowest, the 6s subshell fills first, followed by 4f and 5d (4f first since 4 < 5), then 5f and 6d (5f first since 5 < 6).
 

NickiM84

New Member
10+ Year Member
Joined
Jan 23, 2007
Messages
6
Reaction score
0
1s
2s 2p
3s 3p 3d
4s 4p 4d 4f
5s 5p 5d 5f
6s 6p 6d 6f

Now draw arrows from right to left on a diagnol.
The first arrow will go through 1s
The second arrow will go through 2s
The third arrow will go through 2p and then 3s
The fourth arrow will go through 3p and 4s
Etc. Keep that pattern going and you will understand the order inwhich each subshell is filled. Hope that helped! Although it is difficult to explain without being able to draw it.
 
Top