Which of these best descibe formal charge? select all that apply. select all that apply. a) can be used to determine the most reasonable distribution of electrons in a molecule or ion. b) the formal charge of each atom is calculated by subtracting the number of valence electrons in the neutral atomfrom the number of electrons assigned to the atom. c) the charge that an atom in a molecule or ion would have if all atoms had the same electronegativity. d) the difference between the number of electrons around an atom in the free state and the number of electrons assigned to the atom in the lewis structure an atom in a chemical compound.