All of the wabelenths are visible to the human eye except

Our eyes are sensitive to light which lies to a very small region of the electromagnetic spectrum labeled "visible light". The "vicible light" corresponds to a wavelenght range of 400-700 nanometers (nm) and a color of range of violet through red.

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.