page_title: Iodine
section_title: Physical properties
hierarchical_section_title: Iodine / Properties / Physical properties
caption_attribution_description: Yodo Sublimandose
context_page_description: Iodine is a chemical element. Its atomic number is 53, and its atomic mass is 127. It is part of the Group 7 on the periodic table of elements and its electronic configuration is 2,8,8,18,17. It is a nonmetal.
context_section_description: Iodine is a dark purple-black solid. It is also a nonmetal and a halogen. It sublimes when heated to make a bright purple vapor. This vapor is very irritating, although colorful. Iodine does not dissolve in water, but it does dissolve in a solution of an iodide in water. It dissolves easily in organic solvents.
caption: Iodine vapor
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