iodine atomic number: 53 atomic radius: 140 pm ionization energy of iodine: first- 1008.4 second- 1845.9 electron affinity: 3.0590463 Ionic radius: 220 valence electrons: 7 electronegativity: 2.66 iodine is a P block element on the periodic table of elements history of iodine iodine was discovered by a french chemist named barnard courtois in 1811. courtois was EXTRACTING sodium and potassium COMPOUNDS from seaweed ash. once these COMPOUNDS were removed he added sulfric acid to further process the ash. he accidentally added too much acid and a violet colored cloud erupted from the mass. the gas CONDENSED on metal objects in the room, creating solid iodine. today iodine is OBTAINED from DEPOSITS of sodium iodate and sodium periodate in chili and bolivia.
how is iodine used? 1) potassium iodine has been used to help individuals exposed to radiation by reducing the harmful accumulation of radioactive substances in the thyroid. 2) almost all STERILIZATION products for the body contain iodine. it is a very affective wound cleaner, and has even been used to purify water in tablet or liquid form. 3) irritation to the throat area and thyroid gland is known as goiter. to prevent this condition, it is SUGGESTED to take daily recommended amounts of a nascent iodine supplement to boost overall THYROID health. 4) another iodine solution can be used to assist the body in fighting off harmful ORGANISMS. using an iodine tonic also acts as an expectorant of mucous from the common cold and other respitory problems. 5) iodine is commonly used to treat a number of diffrent eye conditions. it is also a natural protectant against uvb radiation.
Iodine. surrounding elements- bromine, xenon,ASTATINE, and TELLURIUM. electron configuration- bromine is [ar] 4s2 3d10 4p5, Xenon is [kr] 4d10 5s2 5p6, tellurium is [kr] 4d10 5s2 5p4, astatine is [xe] 4f14 5d10 6s2 6p5. physical properties -melting point is at 386.8º f - boiling point is at 367º f - liquid range is at 70.55 k - solid at room TEMPERATURE - violet black color - has a nasty smell -density of a solid is at 4940 kgm to the -3 chemical properties - reacts with air, water, all halogens, and acids. -toxicity= a POISONOUS halogen -corrosion= highly CORROSIVE -DISSOLVES slightly in water - when heated it moves from a solid to vapor