ionic theory

ionic theory
a theory that, on going into solution, the molecules of an electrolyte either completely or partially break up or dissociate into two or more portions, these portions being positively and negatively charged electrically, the positively charged portions being different chemically from those negatively charged. When an electric current is passed through the solution of an electrolyte, the positively charged portions are attracted by the negative pole or electrode, and move toward it; the negatively charged portions are attracted by and migrate toward the positive electrode. From this property of moving toward one of the electrodes, these charged molecular fractions of electrolytes are called ions, from the Greek verb meaning “to move.”

Medical dictionary. 2011.

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