Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
Britannica Sources used in this answer

How many iodine atoms are in a triiodothyronine molecule?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
A labeled diagram highlights the periodic table entry for iodine, atomic number 53, symbol I, atomic weight 126.90447, and electron configuration. It shows iodine as a solid halogen with an orthorhombic crystal structure and strongly acidic higher-valence oxides, using color and shape keys for classification.
iodine

A molecule of triiodothyronine contains three iodine atoms. This is reflected in the hormone's common abbreviation, T3, where the number indicates the count of iodine atoms attached to the thyronine nucleus.123