Soviet Medical Encyclopedia

Anion

Chemistry & Physics, Biochemistry

Also known as: Negative Ion

Historical document, translated for reference. It reflects medical knowledge of the 1920s–30s and is not medical advice.

Summary

An article from the 1928-1936 Soviet Great Medical Encyclopedia defining an anion as an atom or group of atoms carrying a negative electric charge that moves toward the positive pole during electrolysis. It describes the valency of charges and notes their existence in solutions upon dissolution according to the theory of electrolytic dissociation.

Encyclopedia entry (1928–1936)

ANION, an atom or group of atoms bearing a negative electric charge and moving during electrolysis toward the positive pole. The charge of an anion may consist of one (Cl-, OH-, NO3-), two (SO4--, C2O4--), three [Fe(CN)6---], or a greater number of negative elementary charges, which are designated by a corresponding number of minus signs or commas: Cl', C2O4'', Fe(CN)6'''', etc. According to the theory of electrolytic dissociation, anions exist in solutions not only when a current is passed, but are formed at the very moment the electrolyte is dissolved.

Mentioned in

Cite this page

“Anion.” Soviet Medical Encyclopedia. English translation of Bolshaya Meditsinskaya Entsiklopediya, 1st ed. (Moscow, 1928–1936), ed. N. A. Semashko. https://sovietmedicalencyclopedia.pages.dev/article/anion/