Orbitals with the same principal quantum number (n) are said to be in the same shell.

Question

BlackTom AI · Accepted Answer

Consider what is meant by a shell in atomic structure: the principal quantum number n identifies a set of orbitals that share the same energy region in a simple model. All orbitals with the same n are grouped into one shell, regardless of their subshell designation (s, p, d, f) within that n.

Option analysis:
- Statement: 'Orbitals with the same principal quantum number (n) are said to be in the same shell.' This aligns with the fundamental definition of a shell, which comprises all orbitals having the same n value. It includes the s, p, d, f orbitals that belong to that same energy level, within the limitations of the hydrogenic model and common teaching conventions.

Possible misconceptions to address:
- One might think shells are defined by energy alone, independent of n; however, in the standard model, the shell is specifically the group of orbitals with the same n. 
- Another confusion is confusing subshells (different l values) with shells; subshells are subsets of a shell, not separate shells themselves.
- A more nuanced point is that in multi-electron atoms, orbitals with the same n can have slightly different energies due to electron-electron interactions, but the shell concept still uses n as the defining label for grouping orbitals together.

Putting it together, the statement correctly describes the relationship between orbitals and shells in the typical chemical-physics framework, acknowledging that the shell is defined by the shared principal quantum number.

CHEM1012 (L2) Online Quiz #1

Orbitals with the same principal quantum number (n) are said to be in the same shell.

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