Iodine Electron Configuration: Everything You Need to Know

The electronic configuration of an element is used to describe the arrangement of its electrons in its atomic orbitals. Let us discuss the energy levels that enclose an atom.

The electronic configuration of [I] is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4d¹⁰ 5s² 5p⁵, with atomic number 53. Iodine (I) is located in the p-block of the periodic table. It belongs to period 5 and group 17.

This article will discuss information on the electronic configuration of iodine, such as the writing of its electronic configuration and the orbital diagram of ground-state Iodine.

How to write the Iodine electronic configuration

The electronic configuration of [I] is derived using the following steps illustrated.

• Iodine is a 5-period element with a total of 53 electrons, filled in the ascending series of energy levels 1s, 2s, 2p, and so on.
• The s, p, d and f orbitals can hold a maximum of 2, 6, 10 and 14 electrons respectively.
• The configuration of I is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4d¹⁰ 5s² after filling 48 electrons entirely with respective subshells.
• The remaining 5 electrons are filled in the available subshell p, according to Hund’s rule, 3 electrons will be filled, leaving 2 electrons. Then the last subshell will be left with two electrons- that is 5p⁵.
• Thus the complete electronic configuration of [I] is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4d¹⁰ 5s² 5p⁵.

Iodine electron configuration diagram

The electronic configuration of [I] is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4d¹⁰ 5s² 5p⁵. The diagram drawn is as follows, where-

• The s orbital can hold a maximum of 2 electrons
• The p orbital can hold a maximum of 6 electrons
• The d orbital can hold a maximum of 10 electrons and
• The f orbital can hold a maximum of 14 electrons.

Iodine electron configuration notation.

• The electronic configuration notation of [I] is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4d¹⁰ 5s² 5p⁵.
• The electronic configuration notation of I is also written as [Kr] 4d¹⁰, 5s², and 5p⁵, where 36 electrons come from the Krypton noble gas configuration, while the remaining 17 are distributed in the notation.

Iodine unabbreviated electron configuration

The unabbreviated electronic configuration of I is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁵.

Ground state Iodine electron configuration

The ground state electrical configuration is I is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁵.

Excited state Iodine electron configuration

• The first excited state electronic configuration of [I] is [Kr] 4d¹⁰, 5s², 5p⁴, and 5d¹, which is characterized by the transition of one electron from 5d to 6s orbital, creating 5d⁸ and 6s² in the outermost shell.

• The second exciting state electronic configuration of iodine is 4d¹⁰, 5s², 5p³, 5d², resulting from jumping of another molecule from 5p to 5d.

Ground state Iodine orbital diagram

The ground state electronic configuration of I is 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁵ and the orbital diagram is drawn using the following steps.

• At first, the orbitals are arranged in increasing order of energy.
• Then the electrons will be filled according to Aufbau’s principle, Hund’s rule, and Paulis exclusion principle.
• Thus, the ground state orbital diagram represents the electronic configuration of I as 1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p⁵.

Conclusion

An atom’s electrical configuration is expressed as the sum of the energies of the orbitals in which its electrons are located. Iodine has 53 electrons in its outermost shell, with electronic configuration notation [Kr] 4d¹⁰ 5s², 5p⁵. It has two excited states involving the transition of 1 electron from the 5p to 5d spin configuration.

Also Read:

• Aluminium electron configuration
• Helium electron configuration
• Europium electron configuration
• Curium electron configuration
• Nobelium electron configuration
• Fluorine electron configuration
• Sulfur electron configuration
• Lawrencium electron configuration
• Thulium electron configuration
• Praseodymium electron configuration