scroll to top
Stuck on your essay?
Get ideas from this essay and see how your work stacks up
Word Count: 504
Discovered by Bernard Courtois in 1811 Isolated in Paris France Origin The name is derived from the Greek iodes meaning violet Description 1811-Iodine comes as black shiny crystals that dissolve in alcohol the result is sold as an antiseptic solution Iodine salts iodides are used in dyes and photography as industrial catalysts and in the manufacture of pharmaceuticals Iodine is also an essential element for humans who require a daily intake of iodine as iodide of about a tenth of a milligramme only 1300000th of an ounce Our bodies contain up to 20 milligrammes mainly in the thyroid gland Normally we get enough from the food we eat but people eating food grown in areas where the soil lacks iodides can develop a swollen thyroid known as goitre Bernard Courtois observes clouds of purple vapour rising from mother liquor of seaweed ash acidified with sulphuric acid used as a source of sodium and potassium salts The vapours condensed on cold surfaces to yield dark crystals with a metallic luster 1813-Charles-Bernard Desormes and Nicolas Clement report new substance observed by Courtois 1811 after investigating his observations Gay Lussac independantly establishes Iodine as an element He compares Iodine to Chlorine and hydroiodic acid to hydrochloric acid It was a commonly held belief that these two elements and their corresponding acids contained Oxygen Physical properties- Atomic Mass 126904 Density of solid kg m-3 4940 Molar volume cm3 2572 Bulk modulus GPa 77 Electrical resistivity 10-8 W m or mW cm 1015 Melting Point 1135 C Boiling Point 184 C Natural Sources of Iodine-Where does iodine come from If you said seaweed and burnt sponges youre not totally wrong Natural sources of iodine include seafoods vegetables and in much lesser degrees cereal Iodine is present in T3 and T4 thyroxine hormones that are the active principle of the thyroid gland It affects oxygen consumption metabolic rates and fatty
@Kibin is a lifesaver for my essay right now!!
- Sandra Slivka, student @ UC Berkeley
Wow, this is the best essay help I've ever received!
- Camvu Pham, student @ U of M
If I'd known about @Kibin in college, I would have gotten much more sleep
- Jen Soust, alumni @ UCLA