What Element and Isotope Has Z= 43 and 56 Neutrons ${ }_{43}^{ 56} \mathrm{Tc}$

Multiple Choice

What element and isotope has Z= 43 and 56 neutrons?

A) ${ }_{43}^{ 56} \mathrm{Tc}$
B) ${ }_{43}^{ 99} \mathrm{Tc}$
C) ${ }_{43}^{ 96} \mathrm{Tc}$
D) ${ }_{13}^{ 56} \mathrm{Tc}$