33 As Arsenic 74,922 u

Arsenic

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Période
4
Groupe
15
Bloc
p-bloc
Phase (STP)
Solid

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

Apparence: Metallic grey

Propriétés physiques

Masse atomique 74.922 u
Densité 5.727 g/cm³
Point de fusion 816.9 °C
Point d'ébullition 613.9 °C
Phase à STP Solid
Rayon atomique 114.0 pm

Propriétés électroniques

Électronégativité 2.18
Énergie d'ionisation 947.0 eV
Affinité électronique 78.2 eV
Électrons de valence 5

Configuration électronique

Configuration [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

Découverte

Découvert par: Albertus Magnus
Année: 1250

Tableau périodique

Lanthanides Actinides

Compounds Containing Arsenic

Plus de Métalloïde

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 métalloïde.
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.