At standard pressure, the difference between the freezing point and the boiling point of water, in kelvin degrees, is d. 373 a. 100 b. 180 c. 273

Your answer would be A.100 
 
                                       

Ithink the answer is a or d.

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.