The oxidation number of a carbon tetrachloride molecule is 0. Chlorine, being more electronegative than carbon: each atom has -1 oxidation number. read more
The oxidation state of an atom is the charge of this atom after ionic approximation of its heteronuclear bonds. The oxidation number is synonymous with the oxidation state. Determining oxidation numbers from the Lewis structure (Figure 1a) is even easier than deducing it from the molecular formula (Figure 1b). read more