Which Two Atoms Below Have the Same Number of Neutrons ${ }_{8}^{15} \mathrm{O}$

Multiple Choice

Which two atoms below have the same number of neutrons?
${ }_{8}^{15} \mathrm{O}$ , ${ }_{8}^{16} \mathrm{O}$ , ${ }_{9}^{20} \mathrm{F}$ , ${ }_{20}^{20} \mathrm{Ne}$ , ${ }_{11}^{22} \mathrm{Na}$

A) ${ }_{8}^{15} \mathrm{O}$ and ${ }_{8}^{16} \mathrm{O}$
B) ${ }_{8}^{16} \mathrm{O}$ and ${ }_{11}^{22} \mathrm{Na}$
C) ${ }_{9}^{20} \mathrm{F}$ and ${ }_{20}^{20} \mathrm{Ne}$
D) ${ }_{9}^{20} \mathrm{F}$ and ${ }_{11}^{22} \mathrm{Na}$
E) ${ }_{20}^{20} \mathrm{Ne}$ and ${ }_{11}^{22} \mathrm{Na}$