Is it true that the atomic mass of the element Magnesium is 24?

 

Isotopes are those atoms of a chemical element which have the same atomic number, same position in the periodic table and nearly the same chemical properties but they differ in the mass number and physical properties. Isotopes of an element have the same number of electrons and protons but differ in the number of neutrons. So, it is true the atomic mass of element magnesium is 24.