Element 53 of Periodic table is
Iodine with atomic number 53,
atomic weight 126.90447.
Iodine, symbol I, has a
Base Centered Orthorhombic structure and SlateGray color.
Iodine is a halogens element.
Trivial name of Iodine is halogens*.
Know everything about Iodine Facts, Physical Properties, Chemical
Properties, Electronic configuration, Atomic and Crystal Structure.
Iodine is a chemical element with symbol I and atomic number 53. The name is from Greek ἰοειδής ioeidēs, meaning violet or purple, due to the color of iodine vapor. Iodine and its compounds are primarily used in nutrition, and industrially in the production of acetic acid and certain polymers.
Read key information and facts about element Iodine
Explore our interactive periodic table
Periodic table is arranged by atomic number, number of protons in the nucleus which is same as number of
The atomic number increases from left to right. Periodic table starts at top left ( Atomic number 1) and
ends at bottom right (atomic number 118). Therefore you can directly look for atomic number
53 to find Iodine on periodic table.
Another way to read periodic table and locate an element is by using group number (column)
and period number (row). To locate Iodine on periodic
table look for cross section of group 17 and period
5 in the modern periodic table.
Interactive Periodic Table to Understand
and Learn Cool Trends
The element Iodine was discovered by Bernard Courtois in year
1811 in France
derived its name from French iode (after the Greek ioeides, 'violet')
The table below shows the abundance of Iodine in Universe, Sun, Meteorites,
Earth's Crust, Oceans and Human Body.
The solid state structure of Iodine is Base Centered Orthorhombic.
The Crystal structure can be described in terms of its unit Cell. The unit Cells repeats itself in
dimensional space to form the structure.
The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell
Lattice Constants (a, b and c)
and the angles between them Lattice Angles (alpha, beta and gamma).
The positions of the atoms inside the unit cell are described by the set of atomic positions (
xi, yi, zi) measured from a reference lattice point.
The symmetry properties of the crystal are described by the concept of space groups. All possible
symmetric arrangements of particles in three-dimensional space are described by the 230 space groups
(219 distinct types, or 230 if chiral copies are considered distinct.
Iodine atoms have 53 electrons and
the electronic shell structure is [2, 8, 18, 18, 7] with Atomic Term Symbol (Quantum Numbers) 2P3/2.
Shell Structure of Iodine - Electrons per energy
The ground state electronic configuration of Neutral Iodine atom is
[Kr] 4d10 5s2 5p5.
The portion of Iodine configuration that is equivalent to the noble gas of
the preceding period, is abbreviated as [Kr]. For atoms with many electrons, this
notation can become lengthy and so an abbreviated notation is used.This is important as it is
the Valence electrons 4d10 5s2 5p5, electrons in
the outermost shell that determine the chemical properties of the element.
Complete ground state electronic configuration for the Iodine atom, Unabbreviated electronic configuration
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p5
Iodine atomic radius is 115 pm, while it's covalent radius is 133 pm.
The electron affinity of Iodine is 295.2 kJ/mol
Refer to table below for Ionization energies of Iodine
Refer to below table for Iodine Physical Properties
Iodine is Insulator of electricity. Refer to
below for the Electrical properties of Iodine
Refer to table below for Thermal properties of Iodine
Isotopes of rhodium. Naturally occurring Iodine has
1 stable isotope -
List of unique identifiers to search the element in various chemical registry databases