What is the first step in the two step process of making a solution is the breakdown of the solute source into a. atoms b. molecules c. ions d. atomic particles

Firstly, the solute molecules are broken down into atomic particles, as the first step of preparation of a solution. The solvent particles move apart, to make room for solute particles. The solute and solvent molecules the interact with each other, until a uniform concentration if formed, throughout the solution. 

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.