When an element has 12 neutrons and a Z=12, what element and isotope are present?
A) ${ }_{12}^{24} \mathrm{Mg}$
B) ${ }_{12}^{12} \mathrm{Mg}$
C) ${ }_{24}^{24} \mathrm{Mg}$
D) ${ }_{24}^{24} \mathrm{Cr}$

Question

Quizplus · Accepted Answer

The element with Z=12 is Magnesium (Mg). The number of neutrons is 12, so the mass number (A) is Z + N = 12 + 12 = 24, making it ${ }_{12}^{24} \mathrm{Mg}$.

When an Element Has 12 Neutrons and a Z=12, What 1224Mg{ }_{12}^{24} \mathrm{Mg}1224​Mg

When an Element Has 12 Neutrons and a Z=12, What ${ }_{12}^{24} \mathrm{Mg}$