Davy, Humphry iodine

Iodine - the atomic number is 53 and the chemical symbol is I. The name derives from the Greek ioeides for violet colored because of its violet vapors. It was discovered in sea weed ash (kelp) by the French chemist Bernard Courtois in 1811. It was named iodine by the English chemist Humphry Davy in December 1813 and subsequently was named iode by the French chemist Louis-Joseph Gay-Lussac, when he proved it was an element in 1814. Dispite the priority rights dispute between Davy and Gay-Lussac, both acknowledged Courtois as the discoverer of the element. 

Similar to the history of many other elements, iodine s discovery was serendipitous in the sense that no one was looking for it specifically. In 1811 Bernard Courtois (1777—1838), a French chemist, attempted to remove sodium and potassium compounds from the ash of burned seaweed in order to make gunpowder. After removing these chemicals from the ash, he added sulfuric acid (H SO j) to the remaining ash. However, he mistakenly added too much acid, which produced a violet-colored vapor cloud that erupted from the mixture. This violet vapor condensed on all the metallic objects in the room, leaving a layer of sohd black iodine crystals. Sir Humphry Davy (1778—1829) confirmed this discovery of a new element and named it iodine after the Greek word iodes, which means violet, but it was Courtois who was given credit for the discovery of iodine. 

Clement believed iodine to be an element similar to chlorine 12), and showed it, first to J.-A.-C. Chaptal and A.-M. Ampere, and later to Sir Humphry Davy. The proof of its elementary nature was given independently by Davy in England and by Gay-Lussac in France. Davy showed that iodine vapor is not decomposed by a carbon filament heated red-hot by a voltaic current (12, 46). In his classical research, the results of which were published in 1814, Gay-Lussac prepared hydrogen... 

In the same way it is possible using the same relative amounts to bring iJie eleineiu niagiiesinm, which was obtained for the first time in a pure state by Humphry Davy in 1808, to reaction with iodine. 

Davy, Sir Humphry (i778-i829) British chemist, who studied gases at the Pneumatic Institute in Bristol, where he discovered the anaesthetic properties of dinitrogen oxide (nitrous oxide). He moved to the Royal Institution, London, in 1801 and five years later isolated potassium and sodium by electrolysis. He also prepared barium, boron, calcium, and strontium as well as proving that chlorine and iodine are elements. In 1816 he invented the Davy lamp. 

Sir Humphry Davy, 1778-1829. English Chemist and Fellow of the Royal Society who discovered sodium, potassium, and iodine and is known for his early work on electrolysis. 

Davy, Sir Humphry (1778-1829) A chemist, teacher, and inventor born in England, Davy began conducting scientific experiments as a child. As a teen he worked as a surgeon s apprentice and became addicted to nitrous oxide. He later researched galvanism and electrolysis, discovered the elements sodium, chlorine, and potassium, and contributed to the discovery of iodine. He invented the Davy safety lamp for use in coal mines, was a founder of the Zoological Society of London, and served as president of the Royal Society. 

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