When an Element Has Z=15 and 15 Neutrons, What Element ${ }_{15}^{30} \mathrm{p}$

Multiple Choice

When an element has Z=15 and 15 neutrons, what element and isotope are present?

A) ${ }_{15}^{30} \mathrm{p}$
B) ${ }_{15}^{31} \mathrm{P}$
C) ${ }_{15}^{15} \mathrm{P}$
D) ${ }_{30}^{15} \mathrm{P}$