ASAP Just answer the reasoning and the story is there if you need it (probably do though)

Ok so it’s A because if the bacteria got exposed to that same mold that killed the first colony then it will happen again

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.