At Astatine – Element Information, Facts, Properties, Trends,Uses, Comparison with other elements

Astatine History

The element Astatine was discovered by Dale R. Corson in year 1940 in United States . Astatine derived its name from the Greek astatos, 'unstable'

Astatine Presence: Abundance in Nature and Around Us

The table below shows the abundance of Astatine in Universe, Sun, Meteorites, Earth's Crust, Oceans and Human Body.

Crystal Structure of Astatine

The solid state structure of Astatine 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	N/A
Space Group Number	N/A
Crystal Structure	Face Centered Cubic

Astatine Atomic and Orbital Properties

Astatine atoms have 85 electrons and the electronic shell structure is [2, 8, 18, 32, 18, 7] with Atomic Term Symbol (Quantum Numbers) ²P_3/2.

Atomic Number	85
Number of Electrons (with no charge)	85
Number of Protons	85
Mass Number	210
Number of Neutrons	125
Shell structure (Electrons per energy level)	[2, 8, 18, 32, 18, 7]
Electron Configuration	[Xe] 4f14 5d10 6s2 6p5
Valence Electrons	6s2 6p5
Oxidation State	-1 1;3;5;7
Atomic Term Symbol (Quantum Numbers)	2P3/2

Shell Structure of Astatine - Electrons per energy level

n		s	p	d	f
1	K	2
2	L	2	6
3	M	2	6	10
4	N	2	6	10	14
5	O	2	6	10
6	P	2	5

Ground State Electronic Configuration of Astatine - neutral Astatine atom

The ground state electronic configuration of Neutral Astatine atom is [Xe] 4f14 5d10 6s2 6p5. The portion of Astatine configuration that is equivalent to the noble gas of the preceding period, is abbreviated as [Xe]. 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 4f14 5d10 6s2 6p5, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Astatine

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

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p5

Atomic Structure of Astatine

Astatine atomic radius is 127 pm, while it's covalent radius is N/A.

Atomic Spectrum of Astatine

Astatine Chemical Properties: Astatine Ionization Energies and electron affinity

The electron affinity of Astatine is 270.1 kJ/mol

Ionization Energy of Astatine

Refer to table below for Ionization energies of Astatine

Astatine Physical Properties

Refer to below table for Astatine Physical Properties

Elastic Properties

Hardness of Astatine - Tests to Measure of Hardness of Element

Astatine Electrical Properties

Astatine is N/A of electricity. Refer to table below for the Electrical properties of Astatine

Astatine Heat and Conduction Properties

Astatine Magnetic Properties

Optical Properties of Astatine

Acoustic Properties of Astatine

Astatine Thermal Properties - Enthalpies and thermodynamics

Refer to table below for Thermal properties of Astatine

Enthalpies of Astatine

Astatine Isotopes - Nuclear Properties of Astatine

Isotopes of rhodium. Naturally occurring Astatine has 1 stable isotope - None.

Regulatory and Health - Health and Safety Parameters and Guidelines

Database Search

List of unique identifiers to search the element in various chemical registry databases