Electron levels of gaseous redox particles

A reaction in which an electron transfer takes place between two different chemical particles is called a redox reaction this is a combination of an dectron donating reaction and an electron accepting reaction as shown in Eqn. 2-40. The reaction in which a chemical particle donates electrons is called the oxidation, and the particle produced by the oxidation is an oxidant while on the other hand the electron accepting reaction is called the reduction, and its product particle is called a reductant. 

The redox reaction is illustrated with gaseous iron ions Fef , - Fe + Cjsto) , where eism) is the gaseous electron in the standard state. The occupied 

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Fig. 2-35. Localized electron levels of gaseous redox particles, Fe /Fe I = ionization energy of Fe A = electron affinity of Fe (STO) = standard gaseous electrons tsro = standard gaseous electron level (reference zero level).

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