Describe what you would observe when potassium reacts with water

When potassium is added to water the metal melts and floats. It moves around very quickly in the surface of the water.

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.