HClO4
(the four is a subscript)
Chlorine has an oxidation number of +5 in compounds such as perchlorate (ClO4-). This is due to the electronegativity of oxygen, which causes chlorine to have a higher oxidation state in the compound.
The oxidation number of chlorine in KCl is -1. This is because potassium (K) has an oxidation number of +1 and the overall compound is neutral, so the oxidation number of chlorine must be -1 to balance the charge.
In NCl3, chlorine has an oxidation number of -1. The sum of the oxidation numbers in a compound is equal to the overall charge of the compound, which in this case is 0. Since there is only one nitrogen atom in NCl3, its oxidation number must be +3 to balance out the -3 from the three chlorine atoms.
Silver has plus one.Chlorine has minus one.
The Perchlorate salts and Dichlorine heptoxide
Chlorine has an oxidation number of +5 in compounds such as perchlorate (ClO4-). This is due to the electronegativity of oxygen, which causes chlorine to have a higher oxidation state in the compound.
The oxidation number of chlorine in KCl is -1. This is because potassium (K) has an oxidation number of +1 and the overall compound is neutral, so the oxidation number of chlorine must be -1 to balance the charge.
In NCl3, chlorine has an oxidation number of -1. The sum of the oxidation numbers in a compound is equal to the overall charge of the compound, which in this case is 0. Since there is only one nitrogen atom in NCl3, its oxidation number must be +3 to balance out the -3 from the three chlorine atoms.
Silver has plus one.Chlorine has minus one.
The Perchlorate salts and Dichlorine heptoxide
In the compound H2S, hydrogen has an oxidation number of +1, and sulfur has an oxidation number of -2.
Chlorine has an oxidation number of +1 in compounds with metals such as sodium chloride (NaCl) or potassium chloride (KCl).
Usually, oxygen has an oxidation of -2 (that is unless in a compound with peroxides or halogens).
In the compound Al₂O₃, aluminum has an oxidation number of +3, and oxygen has an oxidation number of -2. This gives a total charge of zero for the compound, as it should be electrically neutral.
-2
The oxidation number for Cl in ClO is +1. This is because the oxidation number of oxygen in most compounds is -2, and the sum of the oxidation numbers in ClO must equal the charge of the ion, which is -1.
The oxidation number of calcium in bleaching powder (calcium hypochlorite) is +1. In the compound Ca(ClO)2, the total oxidation numbers of chlorine (-1) and oxygen (-2) balance out to zero, so calcium must have an oxidation number of +1 to maintain overall charge neutrality.