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Earth Sciences
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In a study published in the journal Frontiers of Environmental Science & Engineering, researchers from Sichuan University have unveiled significant insights into the structure–performance relationships of metal–organic ...
Analytical Chemistry
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Materials Science
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An international team led by CU Boulder researchers has cracked the chemical code driving the formation of iodine particles in the atmosphere, revealing how the element contributes to increased cloud cover and depletes molecules ...
Earth Sciences
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The natural cycles of exchange of substances between the biosphere and the atmosphere are of major relevance to the Earth's climatic system. Perhaps the best-known example of this is the carbon cycle that involves the transfer ...
Earth Sciences
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Nanomaterials
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When winds loft fine desert dust high into the atmosphere, iodine in that dust can trigger chemical reactions that destroy some air pollution, but also let greenhouse gases stick around longer. The finding, published today ...
Environment
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262
A team of researchers from ThrustMe, working with colleagues from Sorbonne Université, has successfully tested the use of iodine as an ionizing agent in an ion-thrusting spacecraft engine. In their paper published in the ...
Across the nation, environmentally minded scientists and engineers are leading a new generation of nuclear reactor designs. They see nuclear power as a clean, carbon-free energy source along with hydropower, wind, and solar.
Analytical Chemistry
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An international research team led by Professor Kari Rissanen of the University of Jyvaskyla (Finland) and Professor Antonio Frontera of the University of Balearic Islands (Spain) has demonstrated that positively charged ...
Materials Science
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5
Iodine (pronounced /ˈaɪ.ədaɪn/, /ˈaɪ.ədɨn/, or in chemistry /ˈaɪ.ədiːn/; from Greek: ιώδης iodes "violet"), is a chemical element that has the symbol I and atomic number 53. Naturally-occurring iodine is a single isotope with 74 neutrons.
Chemically, iodine is the second least reactive of the halogens, and the second most electropositive halogen; trailing behind astatine in both of these categories. However, the element does not occur in the free state in nature. As with all other halogens (members of Group XVII in the periodic table), when freed from its compounds iodine forms diatomic molecules (I2).
Iodine and its compounds are primarily used in medicine, photography, and dyes. Although it is rare in the solar system and Earth's crust, the iodides are very soluble in water, and the element is concentrated in seawater. This mechanism helps to explain how the element came to be required in trace amounts by all animals and some plants, being the heaviest element commonly used by living organisms (only tungsten, used in enzymes by a few bacteria, is heavier).
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