As Arsenic – Element Information, Facts, Properties, Trends,Uses, Comparison with other elements

Arsenic History

The element Arsenic was discovered by Bronze Age in year 1250 in unknown place . Arsenic derived its name English word (Latin arsenicum)

Arsenic Presence: Abundance in Nature and Around Us

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

Crystal Structure of Arsenic

The solid state structure of Arsenic is Simple Trigonal.

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	R_ 3m
Space Group Number	166
Crystal Structure	Simple Trigonal

Arsenic Atomic and Orbital Properties

Arsenic atoms have 33 electrons and the electronic shell structure is [2, 8, 18, 5] with Atomic Term Symbol (Quantum Numbers) ⁴S_3/2.

Atomic Number	33
Number of Electrons (with no charge)	33
Number of Protons	33
Mass Number	75
Number of Neutrons	42
Shell structure (Electrons per energy level)	[2, 8, 18, 5]
Electron Configuration	[Ar] 3d10 4s2 4p3
Valence Electrons	4s2 4p3
Oxidation State	-3;-2;-1 1;2;3;4;5
Atomic Term Symbol (Quantum Numbers)	4S3/2

Shell Structure of Arsenic - Electrons per energy level

n		s	p	d	f
1	K	2
2	L	2	6
3	M	2	6	10
4	N	2	3

Ground State Electronic Configuration of Arsenic - neutral Arsenic atom

The ground state electronic configuration of Neutral Arsenic atom is [Ar] 3d10 4s2 4p3. The portion of Arsenic 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 3d10 4s2 4p3, electrons in the outermost shell that determine the chemical properties of the element.

Unabbreviated electronic configuration of neutral Arsenic

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

1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p3

Atomic Structure of Arsenic

Arsenic atomic radius is 114 pm, while it's covalent radius is 119 pm.

Atomic Spectrum of Arsenic

Arsenic Chemical Properties: Arsenic Ionization Energies and electron affinity

The electron affinity of Arsenic is 78 kJ/mol

Ionization Energy of Arsenic

Refer to table below for Ionization energies of Arsenic

Arsenic Physical Properties

Refer to below table for Arsenic Physical Properties

Elastic Properties

Hardness of Arsenic - Tests to Measure of Hardness of Element

Arsenic Electrical Properties

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

Arsenic Heat and Conduction Properties

Arsenic Magnetic Properties

Optical Properties of Arsenic

Acoustic Properties of Arsenic

Arsenic Thermal Properties - Enthalpies and thermodynamics

Refer to table below for Thermal properties of Arsenic

Enthalpies of Arsenic

Arsenic Isotopes - Nuclear Properties of Arsenic

Isotopes of rhodium. Naturally occurring Arsenic has 1 stable isotope - 75As.

Regulatory and Health - Health and Safety Parameters and Guidelines

Database Search

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