Oxidation states are straightforward to work out and to use, but it is quite difficult to define what they are in any quick way. You may, of course, use your periodic table to answer this question. Examples of oxidation number : For example, in MgCl 2 , the oxidation value of magnesium is 2, and the oxidation value of chlorine is -1. In a covalent compound, the oxidation value of an element is equal to the shared electron logarithm of the atomic deviation or bias of the element. 2. 5. The oxidation number of oxygen in a compound is -2, except in peroxides when it is -1. Oxidation number, also called oxidation state, the total number of electrons that an atom either gains or loses in order to form a chemical bond with another atom.. Each atom that participates in an oxidation-reduction reaction is assigned an oxidation number that reflects its ability to acquire, donate, or share electrons. Examples: -2, 3, +1, -1 etc. For example, sodium’s charge is +1, so its oxidation number is +1. oxidation number Examples: Further examples: Note: oxidation number (state) and charge of an element. The oxidation number of hydrogen in a compound is +1, except in metal hydrides such as NaH, when it is -1. The oxidation number of an atom simply shows the number of electrons it can account for in a redox reaction, or the degree to which it has undergone oxidation. 4. For each of the folloiwng elements, state the most common oxidation number (s) and provide an example of a compound containing that element with your stated oxidation number. Examples of oxidation number determinations are provided. This page explains what oxidation states (oxidation numbers) are and how to calculate them and make use of them. Contributors and Attributions CK-12 Foundation by Sharon Bewick, Richard Parsons, Therese Forsythe, Shonna Robinson, and Jean Dupon. We are going to look at some examples … a.lithium b.strontium c.aluminum d.silver e.nitrogen f.oxygen g.fluorine h.zinc i.sulfur j.hydrogen The oxidation number of an atom in elemental form is 0. The oxidation state, sometimes referred to as oxidation number, describes the degree of oxidation (loss of electrons) of an atom in a chemical compound.Conceptually, the oxidation state, which may be positive, negative or zero, is the hypothetical charge that an atom would have if all bonds to atoms of different elements were 100% ionic, with no covalent component. A redox reaction, one of the most fundamental and commonly seen principles of chemistry, is a reaction where electrons are transferred between two atoms/molecules. 3. - Oxidation state is written with the positive or the negative sign coming before the element.