SORRY, YOU WERE INCORRECT.
HERE IS THE EXPLANATION OF THE QUESTION
In all atomic symbols the the number of protons is equal to the atomic number (12 in Magnesium). If the element is electrically neutral then the number of electrons is also equal to the atomic number. If the element is charged, to find the # of electrons, you add one to the atomic number for each (-) charge and subtract one from the atomic number for each (+) charge. The atomic weight of an element represents the number of neutrons + the number of protons. Thus the number of neutrons is equal to: AW - AN.
#14. Magnesium (Mg) with an atomic number of 12 and an atomic mass of 24 has _____________________ neutrons in the nucleus.
a. 8
b .12 - This is the number of neutrons in Magnesium because 24 - 12 = 12.
c. 24
d. 36