Kr Krypton
Element Information, Facts, Properties, Trends, Uses, Comparison with other elements

The solid state structure of Krypton is Face Centered Cubic.

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	Fm_ 3m
Space Group Number	225
Crystal Structure	Face Centered Cubic
Number of atoms per unit cell	4

Krypton atoms have 36 electrons and the electronic shell structure is [2, 8, 18, 8] with Atomic Term Symbol (Quantum Numbers) ¹S₀.

Atomic Number	36
Number of Electrons (with no charge)	36
Number of Protons	36
Mass Number	84
Number of Neutrons	48
Shell structure (Electrons per energy level)	2, 8, 18, 8
Electron Configuration	[Ar] 3d10 4s2 4p6
Valence Electrons	4s2 4p6
Valence (Valency)	2
Main Oxidation States	0
Oxidation States	0, 1, 2
Atomic Term Symbol (Quantum Numbers)	1S0

Bohr Atomic Model of Krypton - Electrons per energy level

n		s	p	d	f

Ground State Electronic Configuration of Krypton - neutral Krypton atom

Abbreviated electronic configuration of Krypton

The ground state abbreviated electronic configuration of Neutral Krypton atom is [Ar] 3d10 4s2 4p6. The portion of Krypton configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Ar]. 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 4s2 4p6, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Krypton

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

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6

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 Krypton

Krypton atomic radius is 88 pm, while it's covalent radius is 110 pm.

Atomic Spectrum of Krypton

The electron affinity of Krypton is 0 kJ/mol.

Ionization Energy of Krypton

Refer to table below for Ionization energies of Krypton

Refer to below table for Krypton Physical Properties

Elastic Properties

Hardness of Krypton - Tests to Measure of Hardness of Element

Krypton Electrical Properties

Krypton is Conductor of electricity. Refer to table below for the Electrical properties ofKrypton

Krypton Heat and Conduction Properties

Krypton Magnetic Properties

Optical Properties of Krypton

Acoustic Properties of Krypton

Refer to table below for Thermal properties of Krypton

Enthalpies of Krypton

Krypton has 32 isotopes, with between 69 and 100 nucleons. Krypton has 6 stable naturally occuring isotopes.

Isotopes of Krypton - Naturally occurring stable Isotopes: 78Kr, 80Kr, 82Kr, 83Kr, 84Kr, 86Kr.