The sum of the oxidation numbers is zero for the compound.
A compound does not have an oxidation number. The individual elements in the compounds have oxidation numbers. Here the oxidation numbers are +2 for the calcium, -2 for each of the oxygens and +5 for the nitrogen.
+2 for calcium, -1 for each chlorine
+2 for calcium, -1 for each chlorine
+4
oxidation number of I is -1. oxidation number of F is +1.
Zn has oxidation number +2; S has oxidation number -2
The oxidation number for H is +1, and the oxidation number for O is -1.
Oxidation number of Si is +4.Oxidation number of O is -2.
Carbon atoms oxidation number is +2.Hydrogen's oxidation number is +1.Oxygen's oxidation number is -2.
oxidation number of I is -1. oxidation number of F is +1.
Hydrogen's oxidation number is +1.Chlorin's oxidation number is +1.Oxygen's oxidation number is -2.
Zn has oxidation number +2; S has oxidation number -2
The oxidation number for H is +1, and the oxidation number for O is -1.
Silicon's oxidation number is +4.Oxygen's oxidation number is -2
Oxidation number of Si is +4.Oxidation number of O is -2.
Carbon atoms oxidation number is +2.Hydrogen's oxidation number is +1.Oxygen's oxidation number is -2.
Potassium's oxidation number is +1. Chromium's oxidation number is +6. Oxygen's oxidation number is -2.
Oxidation number of Li is +1. Oxidation number of oxygen is -2.
MnCl2: oxidation number +2MnO2: oxidation number +4KMnO4: oxidation number +7
The Oxidation number for Kr which is krypton is 2. The Oxidation number for Kr which is krypton is 2. The Oxidation number for Kr which is krypton is 2.
Oxidation number of Nb is +4. Oxidation number of O is -2.