Iodine is a purple-black lustrous flaky crystal with an atomic number of 53. The isotope that exists in nature is 74 neutrons of iodine-127. Iodine has a high vapor pressure and sublimes under slight heat. The pure iodine vapor is dark blue. If it contains air, it is purple-red and has a pungent odor.
Melting point 386.85 K (113.7 °C, 236.66 °F)
Boiling point 457.4 K (184.3 °C, 363.7 °F)
Critical point 819 K, 11.7 MPa
Atomic weight 126.90447 g/mol
Crystal structure orthorhombic
Atomic radius 140 pm
Calculated value 115 pm
Price electronic arrangement [Kr] 4d 5s 5p
The arrangement of electrons at each level 2, 8, 18, 18, 7
The chemical properties of iodine are not as active as the group elements F2, Cl2 and Br2, and it can also exhibit various oxidation states from -1 to +7 in chemical reactions. Gerhold Chemetals Co., Ltd supply the Iodine for sell, any more information please contact us!