Degeneracy of hydrogen energy levels

In summary, the conversation discusses a hypothetical universe where the intrinsic spin of the electron is S = 5/2, and the degeneracy of the n=1 and n=2 levels of hydrogen is considered. It is mentioned that electrons in an atom have 4 quantum numbers and that the n=1 and n=2 states have a degeneracy of 6 and 24, respectively. The conversation concludes with confirmation that the reasoning is correct.
  • #1
lonewolf5999
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Consider a universe where the intrinsic spin of the electron is S = 5/2, but all other parameters and Rules of Quantum Mechanics are the same. Find the degeneracy of the n=1 and n=2 levels of hydrogen.

My understanding is that electrons in an atom have 4 quantum numbers n,l,ml,ms, and different electrons can't have all 4 quantum numbers being the same. Since we have S = 5/2, we can have ms = -5/2, -3/2, -1/2, 1/2, 3/2, 5/2. For n = 1, usual rules tell us l = 0 and ml = 0, so since ms can have 6 different values, the n = 1 state has a degeneracy of 6 and can accept up to 6 electrons.

For n = 2, l = 0, the reasoning is the same as above, so that orbital also has a degeneracy of 6. For n = 2, l = 1, ml = -1, 0 or 1, and for each of these ml we can have 6 different ms, so we have a degeneracy of 18 for n = 2, l = 1 and thus a total degeneracy of 24 for n = 2.

Is this reasoning correct, or am I missing something in the problem?
 
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  • #2
Yeah, you got it.
 
  • #3
Ok, thanks for the reply!
 

Related to Degeneracy of hydrogen energy levels

1. What is degeneracy in terms of hydrogen energy levels?

Degeneracy refers to the phenomenon where two or more energy levels in an atom have the same energy value. In the case of hydrogen, the energy levels are degenerate when they have the same principal quantum number (n) but different values for the angular momentum quantum number (l) and magnetic quantum number (ml).

2. How does degeneracy affect the behavior of electrons in the hydrogen atom?

Degeneracy allows for electrons in the same energy level to have different orientations, resulting in different sublevels or orbitals. This allows for more electron configurations and increases the number of possible energy states for the atom.

3. What is the significance of degeneracy in the hydrogen atom?

Degeneracy plays a crucial role in understanding the atomic structure of hydrogen. It helps explain the spectral lines observed in the emission or absorption of light by hydrogen, as well as the energy levels of electrons and their probability distributions within the atom.

4. How does the degeneracy of energy levels change with increasing principal quantum number (n) in hydrogen?

The degeneracy of energy levels decreases with increasing principal quantum number (n) in hydrogen. For example, the n=1 energy level has only one possible state (s orbital), while the n=2 energy level has two possible states (s and p orbitals), and so on.

5. Can degeneracy occur in other atoms besides hydrogen?

Yes, degeneracy can occur in other atoms besides hydrogen. It is a common phenomenon in atoms with more than one electron, such as helium and carbon. However, the degeneracy of energy levels in these atoms is more complex and depends on the number of electrons and their interactions within the atom.

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