What step is the fossil fuels are burned the thermal energy if the burning fuel turns water into steam

Answer condenser/ this energy is used to boil water to make steam. (heat)

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.