Question

What is mean by L to L

Answer 1

I think ur asking magnetic quantum number
it's not L to L it is -l to +l
L is azimuthal quantum number
L =0,s-subshell,0
L =1,p-subshell, -1,0,1
L =2,d-subshell, -2,-1,0,1,2
L =3,f-subshell, -3,-2,-1,0,1,2,3
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Answer 2

Answer:

In my experience, an “L” refers to take an above ground ( or ‘'elevated’) subway line. Given the fact that it is above ground, quite a distance above street level, it wasn't felt right to continue to call them ‘'subways’ as in underground, so they were called elevated subway, which eventually devolved into simply “the L.”