IODINE

The iodine is a chemical element of atomic placed number 53 in the group of the halogens (group 17) of the periodic table of the elements. Is his symbol I (of the Greek ιώδης "Violet"). It is a solid black, gloss, and volatile; it gets his name for his steam of violet color. This atom can be in molecular form as an atom.

It is a trace element and uses principally in medicine, photography and as colouring. Chemically, the iodine is the halogen less reagent and electronegativo. Since with all the other halogens (members of the Group the VIIth in the periodic table), the iodine forms diatomic molecules and for it it forms the compound of iodine of molecular formula I2.
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