Chemical Elements History and Information Iodine

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About the chemical element Iodine, its symbol, atomic number and weight, who discovered it and when.

The Atomic Elements and Their Uses

(Element) (Symbol) (Atomic number) (Atomic weight)

Iodine I 53 126.9045

Discovered by Bernard Courtois of France in 1811. Extracted from natural brines and ashes of seaweed, it is one of the oldest disinfectants. Today "tincture of iodine" has been largely replaced by iodine complexed with polyvinyl pyrrolidine. Most table salt has iodine added to prevent goiter. Silver iodine is used for seeding clouds.


© 1975 - 1981 by David Wallechinsky & Irving Wallace
Reproduced with permission from "The People's Almanac" series of books.
All rights reserved.

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