Chemistry - GENERAL CHEMISTRY Question with Solution | TestHub

Subshell Rule Modification: Under the hypothetical condition $\ell =0to(n+1)$, a shell $n$ contains $(n+2)$ subshells instead of $n$, expanding the total orbitals per shell to $(n+2{)}^2$.

Option A & C Verification: For $n=3$, $\ell =4$ exists, which introduces the g-block to this universe; applying the $(n+\ell )$ filling rule determines that the 4th period will accommodate exactly 32 elements.

Option B Refutation: Since $\ell =3$ ($f$-block) first becomes available when $n=2$, $f$-block elements would appear in the 2nd period rather than the 3rd.

Option D Verification: Given the absolute universe limit of 118 total elements, the 6th period is truncated and can only hold the remaining 10 elements to reach this cap.