Elements · ← Te Tellurium · Xe Xenon →
The thyroid gland concentrates iodine, which makes radioactive iodine a thyroid treatment.
| Symbol | I |
|---|---|
| Atomic number | 53 |
| Standard atomic weight | 126.9045 |
| Group | 17 |
| Period | 5 |
| Block | p-block |
| Category | Halogen |
| Standard state | Solid |
| Discovered | 1811 |
Source: PubChem, Iodine (periodic table data, retrieved 2026-10-19). Group and period follow the standard 18-column periodic table.
Hertz reported a three-to-five-year follow-up of 29 patients with hyperthyroidism treated from 1941 to 1946 with "internal irradiation" from radioactive iodine.
As reported in: HERTZ (1946). RADIOACTIVE IODINE IN THE STUDY OF THYROID PHYSIOLOGY. Journal of the American Medical Association. doi:10.1001/jama.1946.02870190005002
Abstract only
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