1. Code letters for orbital quantum numbers (l):
QUESTION:
What is the value of the orbital quantum number for an electron in a 3p orbital? A. 0, B. 1, C. 2, D. 3
Code letters for orbital quantum numbers (l):
l=0: s. l=1: p l=2: d l=3; f l=4; g
Note; for a given principal quantum number (n), allowed values of orbital quantum number (l) are non-negative integers less than n. For n=3, allowed values of l are 0, 1, and 2 These correspond to 3s, 3p, and 3d orbitals.
SCRIPT
What is the value of the orbital quantum number for an electron in a 3p orbital?
0…1…2…or 3
PAUSE 2 SECONDS
CLICK
It is customary to use code letters for the orbital quantum number ell…
The code letters are as follows….
Ess for ell equals zero
Pee for ell equals one
Dee for ell equals two
Eff for ell equals three
And
Gee for ell equals four
Therefore, for an electron in a 3p orbital,
the orbital quantum number ell is equal to 1.
PAUSE 2 seconds
Note that for a given principal quantum number en, the allowed values of ell are the non-negative integers less than en….
For example… for n equals 3… the allowed values of ell are zero, one, and two.
These correspond to three-ess,…
HIGHLIGHT n=3 and 3 in 3s, 3p, and 3d (yellow)
HIGHLIGHT 0 and s (light green)
Three pee…
HIGHLIGHT 1 and p (light purple)
And three dee…
HIGHLIGHT 2 and d (light blue)
Note that there are no 3f orbitals, since the orbital quantum number ell cannot be equal to 3 if en is 3.
END RECORDING

2. Video ID: © 2008, Project VALUE (Video Assessment Library for Undergraduate Education), Department of Physical Sciences Nicholls State University Author: Glenn V. Lo Funded by Louisiana Board of Regents Contract No. LA-DL-SELECT-13-07/08