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Degree of ionization
The degree of ionization (also known as ''ionization yield'' in the literature) refers to the proportion of neutral particles, such as those in a gas or aqueous solution, that are ionized to charged particles. A low degree of ionization is sometimes called ''partially ionized'', and a very high degree of ionization as ''fully ionized''.
Ionization refers to the process whereby an atom or molecule loses an electron, resulting in two oppositely charged particles, (1) a negatively charged electron and (2) a positively charged ion.
==Chemistry usage==
The degree of dissociation ''α'' (sometimes also degree of ionization), is a way of representing the strength of an acid. It is defined as the ratio of the number of ionized molecules and the number of molecules dissolved in water. It can be represented as a decimal number or as a percentage. One can classify strong acids as those having ionization degrees above 30%, weak acids as those with ''α'' below 30%, and the rest as moderate acids, at a specified molar concentration.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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