1. Iodine: Iodine, Jod, Yodo. Name came from the greek word "Iodes" meaning "violet" beacause of its bluish-black color.
2. As a pure element, it looks like a lustrous solid.
3. Iodine has 53 protons and 74 neutrons in its common isotope. Its naturally occuring isotope is 127 with no half-life and the abundance is 100%. Its average atomic mass is 126.9.4. There are 53 electrons in its neutral atom. The electron affinity of Iodine is 295.2 kJ mol-1.
5. Its atomic radius is 266.66 x 10-12 m
6. -Melting Point is 236.66 °F
- Boiling Point is 363.7 °F
7. Its abundance in its body is 4.93 g/cm3. Abundance in Earth's crust 2.690196 ppb by weight. Abundance in the universe is 1 ppb by weight.
8. Some compounds formed by Iodine are: Iodine Pentafluoride (IF5), Idodine Chloride (ICl), and Iodine heptafluoride (IF7)
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| Iodine Pentafluoride |
9. Iodine was discovered by Barnard Courtois in 1811 in France. He isolated iodine from treating seaweed ash with sulphuric acid (H2SO4) while recovering sodium and potassium compounds.
10. Some uses of Iodine are:
- iodide and thyroxin which contains iodine, are used internally in medicine. It is used as a disinfectant for external wounds.
- silver iodide is used in photography
- deep blue color in a starch solution is used to show a sign of the free element
- deep blue color in a starch solution is used to show a sign of the free element
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| Iodine Chloride |
11. Iodine is an important part of the human diet and in fact appears to be the heaviest required element in the diet.
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| Iodine Heptafluoride |
