Iodine (symbol I) is element number 53 of the periodic table and belongs to the “Halogen” category. Its atomic mass is about 126.9, and its phase under standard conditions is Solid. This element sits in period 5 and group 17 of the periodic table, and its electrons are arranged in shells of 2, 8, 18, 18, 7. The short electron configuration of Iodine is [Kr] 4d¹⁰ 5s² 5p⁵. Known uses of Iodine include Disinfection, Photography and Thyroid hormone.
The electron configuration of Iodine (I), with 53 electrons, is shown below. The last shell (shell 5) is highlighted:
Distribution of 53 electrons of Iodine across shells K to O:
The halogens are the group 17 elements: highly reactive nonmetals that form salt compounds with metals.
The atomic number of Iodine (I) is 53; that is, every atom of it has 53 protons.
The electron configuration of Iodine (I) is 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁵; in short form it is [Kr] 4d¹⁰ 5s² 5p⁵, and its last shell is 5s² 5p⁵.
The chemical symbol of Iodine is I.
Iodine is located in period 5 and group 17 and belongs to the “Halogen” category.
The atomic mass of Iodine is about 126.9 (atomic mass units).
The phase of Iodine under standard conditions is Solid.
Uses of Iodine include Disinfection, Photography and Thyroid hormone.
Iodine was discovered by Bernard Courtois in 1811.
Fluorine (F)Chlorine (Cl)Bromine (Br)Astatine (At)Tennessine (Ts)
Fluorine (F)Chlorine (Cl)Bromine (Br)Astatine (At)Tennessine (Ts)
