How Many Orbitals in the 3rd Shell?

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Discussion Overview

The discussion centers around the number of orbitals in the third shell of an atom, exploring the contributions of various subshells. Participants engage in clarifying the definitions and counting methods related to atomic orbitals.

Discussion Character

  • Conceptual clarification, Technical explanation, Debate/contested

Main Points Raised

  • One participant suggests that the total number of orbitals in the third shell is 9, derived from adding the orbitals of the subshells.
  • Another participant proposes that the s subshell contributes 1 orbital, the p subshell contributes 3 orbitals, and the d subshell contributes 5 orbitals, leading to a total of 9.
  • A different viewpoint questions whether the counting starts from the third shell or the fourth shell, indicating a potential misunderstanding of the shell structure.
  • Further clarification is provided that the third shell includes 3s (1 orbital), 3p (3 orbitals), and 3d (5 orbitals), confirming the total of 9 orbitals.

Areas of Agreement / Disagreement

Participants express differing views on the starting point for counting orbitals, leading to some confusion. While one perspective asserts that there are 9 orbitals in the third shell, another participant questions the counting method, indicating that the discussion remains somewhat unresolved.

Contextual Notes

The discussion highlights potential ambiguities in defining which shell is being referenced and how orbitals are counted, which may depend on the interpretation of subshells and their respective contributions.

Miike012
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Question: There are ___ orbitals in the third shell.

25
4
9
1

I picked 4... but the answer is 9... How did they come up with this?
 
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I believe by adding together the orbitals of the subshells.

The s subshell has 1 orbital, the d has 3, and p has 5, hence 9 =)
 
Isnt that the fourth shell that you are counting from?

I was starting at 3s... with one orbital.. then 3p with 3 orbitals...
 
Then after that is 4s, but then it returns to 3d, which is 5 orbitals. So overall, the 3rd shell has 9 orbitals.
 
Gotcha... thank you.
 

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