Which type of substance can conduct electricity in the liquid phase but not in the solid phase?

Ionic substances formed from complete transfer of electrons from one atom to another causing electrostatic attraction

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.

You would do 1500/4 and the answer is 375