dcm18 Posted November 5, 2007 Share Posted November 5, 2007 Can anyone tell me how I can determine the allowed quantum numbers, ml and ms, and the max occupancy of sub shells for lets say 5g....... How can I determine the ground-state term symbols for lets say p^4 or d^5.... And finally how do i figure out the term symbols for ground-state configurations of the atoms H thru F? Any direction would be much appreciated.... Thanks Link to comment Share on other sites More sharing options...
Riogho Posted November 5, 2007 Share Posted November 5, 2007 Look up Noble Gas Configuration Link to comment Share on other sites More sharing options...
Testo Posted November 18, 2007 Share Posted November 18, 2007 For determining quantum numbers; n = 1,2,3,4... l = 0,1,2,3...(n-1) ml = 0, +/-1, +/-2, +/-3...+/-l ms = +/-0.5 So for 5g, n=5 and l=4 (0=s, 1=p, 2=d etc.) so ml values can be -4 up to +4 (nine orbitals) each with 2 electrons with +0.5 and -0.5, max occupancy is 18 electrons Term symbols are more tricky; the letter represents the orbital quantum number l, the left superscript is the spin multiplicity = 2s+1 where s is the total spin angular momentum quantum number. A single electron has an s of 0.5 so 2(0.5)+1 = 2. Two electrons has two combinations S = 0, 1 (0.5+0.5=1, 0.5-0.5=0) which gives Either 1 (singlet state) or 3 (triplet state) spin multiplicities and so on.... The right subscript is the total angular quantum number J = L+S, L+S-1, ... |L-S| The best way to show this is an example e.g. H 1s^1; s=0.5 => 2s+1 = 2 l=0 => S J= 0+0.5 = 0.5 For He 1s^2 s=0, 1 => 2s+1 = 1 AND 3 l=0 => S J= 0+0 = 0 AND 0+1 = 1 So helium has a triplet S and a singlet S state Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now