What are the Isotopes, Isobars and Isotones of an ElementThe proton number of an atom determines the type of element. For example, the proton number Z = 11 is for the element sodium while Z = 12 is for magnesium. Therefore, all atoms of the same element contain the same number of protons. The number of neutrons in the atoms of an element may be different. These atoms … [Read more...] about What are the Isotopes, Isobars and Isotones of an Element