Iodine Element Facts - Atomic Number 53, Symbol I, Atomic Mass 126.9 #3648881 (License: Personal Use)

This lime-green periodic table tile displays iodine (I), a halogen with atomic number 53 and standard atomic weight of 126.90447 u. Iodine is essential for human health, particularly in thyroid hormone synthesis, and appears as a shiny black solid that sublimes into a violet gas. Its unique properties make it valuable in medicine, disinfection, and industrial chemistry.

Used on educational science websites, chemistry textbooks, or health resource pages to illustrate elemental data; matches user intent for quick reference, study aids, or科普 content about essential nutrients and elements.