jodidiionien

Jodidiionien, often referred to as iodide ions, are chemical species with the chemical formula I⁻. They are anions, meaning they carry a negative electrical charge. This negative charge arises from a neutral iodine atom gaining an electron. Iodine itself is a halogen, located in Group 17 of the periodic table. As a group, halogens are known for their tendency to gain an electron to achieve a stable electron configuration.

In aqueous solutions, iodide ions are soluble and are common components of various natural and synthetic substances. They play a significant role in biological systems, most notably in the production of thyroid hormones by the thyroid gland. Thyroid hormones, thyroxine (T4) and triiodothyronine (T3), are essential for regulating metabolism, growth, and development. Iodine deficiency can lead to serious health issues, including goiter and hypothyroidism.

Iodide ions are also utilized in various industrial and medical applications. In medicine, potassium iodide is sometimes used as a radioprotectant to protect the thyroid gland from absorbing radioactive iodine, particularly during nuclear emergencies or certain medical treatments. In photography, silver iodide (AgI) was historically important as a light-sensitive compound used in photographic emulsions. The chemistry of iodide ions involves redox reactions, where they can act as reducing agents, donating electrons. Their presence in water can be monitored and is an indicator of water quality in some contexts.