33 As Arsenic 74,922 u

Arsenic

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Periode
4
Gruppe
15
Block
p-Block
Phase (STP)
Solid

Arsenic is a metalloid known since antiquity, historically notorious as a poison. It is used in semiconductors and wood preservatives.

Erscheinungsbild: Metallic grey

Physikalische Eigenschaften

Atommasse 74.922 u
Dichte 5.727 g/cm³
Schmelzpunkt 816.9 °C
Siedepunkt 613.9 °C
Phase bei STP Solid
Atomradius 114.0 pm

Elektronische Eigenschaften

Elektronegativität 2.18
Ionisierungsenergie 947.0 eV
Elektronenaffinität 78.2 eV
Valenzelektronen 5

Elektronenkonfiguration

Konfiguration [Ar] 3d¹⁰ 4s² 4p³

Electron Shell Configuration

Arsenic electron shell configuration As 2e⁻ 8e⁻ 18e⁻ 5e⁻

Position in Periodic Table

Arsenic position in the periodic table As

Entdeckung

Entdeckt von: Albertus Magnus
Jahr: 1250

Periodensystem

Lanthanide Actinide

Compounds Containing Arsenic

Mehr Halbmetall

Frequently Asked Questions

What is Arsenic?
Arsenic (As) is a chemical element with atomic number 33. It is a solid at standard temperature and pressure, classified as a halbmetall.
What are the key properties of Arsenic?
Arsenic has an atomic mass of 74.922 u, density of 5.727 g/cm³, melting point of 816.9°C, boiling point of 613.9°C.
What is the electron configuration of Arsenic?
The electron configuration of Arsenic is [Ar] 3d10 4s2 4p3. It is in the p-block of the periodic table.
Who discovered Arsenic?
Arsenic was discovered by Albertus Magnus in 1250.
What is the electronegativity of Arsenic?
Arsenic has an electronegativity of 2.18 on the Pauling scale.