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) ${ }_{13}^{ 56} \mathrm{Tc}$

Question

Quizplus · Accepted Answer

The atomic number (Z) represents the number of protons in an atom, and the mass number is the sum of protons and neutrons. Given Z=43, the element is Technetium (Tc). With 56 neutrons, the mass number is 43 (protons) + 56 (neutrons) = 99, making the correct isotope ${ }_{43}^{ 99} \mathrm{Tc}$.

What Element and Isotope Has Z= 43 and 56 Neutrons 4356Tc{ }_{43}^{ 56} \mathrm{Tc}4356​Tc

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