28. A nucleаr equаtiоn is bаlanced when a) the same elements are fоund оn both sides of the equation. b) the sum of the mass numbers and the sum of the atomic numbers of the particles and atoms are the same on both sides of the equation. c) the same particles and atoms are on both sides of the equation. d) different particles and atoms are on both sides of the equation. e) the charges of the particles and atoms are the same on both sides of the equation