### Test #2

Posted:

**Fri Oct 26, 2018 5:36 pm**What does degeneracy mean?

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=21&t=34911

Page **1** of **1**

Posted: **Fri Oct 26, 2018 5:36 pm**

What does degeneracy mean?

Posted: **Fri Oct 26, 2018 5:46 pm**

Orbitals that have the same energy levels are called degenerate (same n and l quantum numbers)

Posted: **Sun Oct 28, 2018 9:55 pm**

How many degeneracies can there be?

Posted: **Thu Nov 01, 2018 10:58 pm**

Degenerate means having the same energy. In the context of orbitals it is the number of atomic orbitals in the same subshell. Say the question is, how many degenerate 3p orbitals exist? (Remember: we need to see how many orbitals share the same n and l quantum numbers) If n = 3 and l = 1, ml could be either -1, 0, or 1. Each electron with quantum number ml being -1, 0, or 1 have the same energy based on their quantum numbers n = 3 an l = 1. Therefore, there are three degenerate 3p orbitals that exist.