Question

How many electrons can fit into the orbitals that comprise the $3^{rd}$ quantum shell $n=3$?

• A. $2$
• B. $8$
• C. $18$
• D. $32$

Answer 1

Answer: (C)

$n=3$
electrons in $3^{r}d$ shell $=2n^2$
$=2\times 32=18$