Fill in the blank with the correct number to balance the equation: 4Cr + 3O2 → ___Cr2O3

2Cr2O3, This would make 4 Cr and 6 O on both sides of the equation

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.