Problem 39 Easy Difficulty. Other articles where Iodine-127 is discussed: iodine: Occurrence and distribution: …isotope of iodine is stable iodine-127. Iodine-129 is a rare long-lived radio-isotope of Iodine. There are several forms of iodine isotopes, with I-131 being formed mainly by nuclear fission reactions. 124 I decays to 124 Te. Iodine-124 Iodine-124 is a part positron emitter often used for PET scans. Iodine-123 (half-life 13 hours) is the isotope of choice for nuclear medicine imaging of the thyroid gland, which naturally accumulates all iodine isotopes. Iodine-131 (half-life 8 days) is a beta-emitting isotope, which is a common nuclear fission product. It has a half life of 13 seconds. It is also created artificially in nuclear fission reactions and naturally in nature by spontaneous uranium decay. Radioactive iodine, I-131, was also released by the reactors. It is associated with nuclear energy, medical … Three radioactive isotopes of iodine are currently used in clinical medicine:. Iodine -131. 1. 82 Determine the number of neutrons in an atom of I-127. There are 37 isotopes of iodine (I) and only one, 127 I, is stable.. There is no Iodine Natural Radioactive isotopes known. Iodine-124 is a proton-rich isotope of iodine with a half-life of 4.18 days. Iodine-123 Iodine-123 is a gamma emitter with no beta radiation. 131 I has a radioactive half-life of 8 days and a high-energy emitter; it is used mainly in the therapy of hyperthyroidism and thyroid cancer.. 2. Iodine has many isotopes, but only iodine-127 is stable and is found in nature. Krypton-81m Krypton-81m is used for the diagnosis of lung disease and pulmonary function. An exceptionally useful radioactive isotope is iodine-131, which has a half-life of eight days. Artificial Radioactive isotopes. Iodine-131 (131 I, I-131) is an important radioisotope of iodine discovered by Glenn Seaborg and John Livingood in 1938 at the University of California, Berkeley. The Commission last revised the standard atomic weight of iodine in 1985 based on the latest Atomic Mass Evaluation by IUPAP. I-129 is called a cosmogenic nuclide, because it is created by energetic cosmic rays impacting matter in a cosmic fission reaction, called spallation. [1] Iodine-131 is also radioactive and has many important medical uses. In many ways, 129 I is similar to 36 Cl. Iodine is a water-soluble element that has an atomic number of 53 and an atomic mass of approximately 126.9. It is employed in medicine to monitor thyroid gland functioning, to treat goitre and thyroid cancer, and to locate tumours of the brain and of the liver. Iodine is a monoisotopic element and its atomic weight is determined solely by its isotope 127 I. Iodine-124 can be made by numereous nuclear reactions via a cyclotron. It is regularly used for evaluating thyroid function. It has a half-life of 4.2 days. The administration of known goitrogen substances can also be used as a prophylaxis in reducing the bio-uptake of iodine, (whether it be the nutritional non-radioactive iodine-127 or radioactive iodine, radioiodine - most commonly iodine-131, as the body cannot discern between different iodine isotopes). It is a soluble halogen, fairly non-reactive, exists mainly as a non-sorbing anion, and is produced by cosmogenic, thermonuclear, and in-situ reactions. The most common starting material used is 124 Te. Its modes of decay are: 74.4% electron capture, 25.6% positron emission. It has a radioactive decay half-life of about eight days. Iodine radioactive isotope number 1: 108 I: Neutrons: : 55; Jn: One radioactive iodine isotope, I-108, decays by alpha particle emission. 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