Cl Chlorine
Element Information, Facts, Properties, Trends, Uses, Comparison with other elements

The solid state structure of Chlorine is Base Centered Orthorhombic.

The Crystal structure can be described in terms of its unit Cell. The unit Cells repeats itself in three dimensional space to form the structure.

Unit Cell Parameters

The unit cell is represented in terms of its lattice parameters, which are the lengths of the cell edges 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 ( x_i, y_i, z_i) 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.

Space Group Name	Cmca
Space Group Number	64
Crystal Structure	Base Centered Orthorhombic
Number of atoms per unit cell

Chlorine atoms have 17 electrons and the electronic shell structure is [2, 8, 7] with Atomic Term Symbol (Quantum Numbers) ²P_3/2.

Atomic Number	17
Number of Electrons (with no charge)	17
Number of Protons	17
Mass Number	35
Number of Neutrons	18
Shell structure (Electrons per energy level)	2, 8, 7
Electron Configuration	[Ne] 3s2 3p5
Valence Electrons	3s2 3p5
Valence (Valency)	5
Main Oxidation States	-1, 1, 3, 5, 7
Oxidation States	-1, 1, 2, 3, 4, 5, 6, 7
Atomic Term Symbol (Quantum Numbers)	2P3/2

Bohr Atomic Model of Chlorine - Electrons per energy level

n		s	p	d	f

Ground State Electronic Configuration of Chlorine - neutral Chlorine atom

Abbreviated electronic configuration of Chlorine

The ground state abbreviated electronic configuration of Neutral Chlorine atom is [Ne] 3s2 3p5. The portion of Chlorine configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Ne]. 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 3s2 3p5, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Chlorine

Complete ground state electronic configuration for the Chlorine atom, Unabbreviated electronic configuration

1s2 2s2 2p6 3s2 3p5

Electrons are filled in atomic orbitals as per the order determined by the Aufbau principle, Pauli Exclusion Principle and Hund’s Rule.

As per the Aufbau principle the electrons will occupy the orbitals having lower energies before occupying higher energy orbitals. According to this principle, electrons are filled in the following order: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p…

The Pauli exclusion principle states that a maximum of two electrons, each having opposite spins, can fit in an orbital.

Hund's rule states that every orbital in a given subshell is singly occupied by electrons before a second electron is filled in an orbital.

Atomic Structure of Chlorine

Chlorine atomic radius is 79 pm, while it's covalent radius is 99 pm.

Atomic Spectrum of Chlorine

The electron affinity of Chlorine is 349 kJ/mol.

Ionization Energy of Chlorine

Refer to table below for Ionization energies of Chlorine

Refer to below table for Chlorine Physical Properties

Elastic Properties

Hardness of Chlorine - Tests to Measure of Hardness of Element

Chlorine Electrical Properties

Chlorine is Conductor of electricity. Refer to table below for the Electrical properties ofChlorine

Chlorine Heat and Conduction Properties

Chlorine Magnetic Properties

Optical Properties of Chlorine

Acoustic Properties of Chlorine

Refer to table below for Thermal properties of Chlorine

Enthalpies of Chlorine

Chlorine has 24 isotopes, with between 28 and 51 nucleons. Chlorine has 2 stable naturally occuring isotopes.

Isotopes of Chlorine - Naturally occurring stable Isotopes: 35Cl, 37Cl.