The halogen in Period 5 of the periodic table, which has six letters, is Iodine. It is located in Group 17 of the periodic table, the halogen group, which includes other elements like fluorine, chlorine, bromine, and astatine. Iodine is a non-metal and plays a significant role in biological systems, particularly in the human thyroid gland. It is used in the production of thyroid hormones that regulate metabolism. In its elemental form, iodine is a dark purple-black solid, but it sublimes into a violet-colored gas when heated. Iodine is also widely used as an antiseptic in medical applications and in the production of dyes, and it is often added to table salt to prevent iodine deficiency, which can lead to thyroid problems such as goiter. Iodine’s chemical properties and versatility make it an essential element in various industries.
