# Question #8926c

Sep 3, 2017

${.}^{\text{16}} O$
The definition of quantum spin is $\text{+/-} \left(\frac{1}{2}\right)$. A fractional quantum spin thus can only exist when there are unpaired electrons.
$1 {s}^{2} 2 {s}^{2} 2 {p}^{4}$