Immediately! is the chemical reaction 4ai + 202 --> 2ai203 balanced?

4Al + 3O2 --> 2Al2O3

Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus. and thus finally, if we have the 32s2− ion, there are 18 electrons, 16 protons, and 16 neutrons.

They are all full and don't need any more electrons in there outer shell.