When an Element Has Z=1 and No Neutrons, What Element ${ }_{0}^{1} \mathrm{H}$

Multiple Choice

When an element has Z=1 and no neutrons, what element and isotope is this?

A) ${ }_{0}^{1} \mathrm{H}$
B) ${ }_{1}^{1} \mathrm{H}$
C) ${ }_{1}^{0} \mathrm{H}$
D) ${ }_{1}^{2} \mathrm{H}$