Arsenic
Arsenic (As) is a metalloid with atomic number 33 and atomic mass 74.922 u. It sublimates at normal pressure and exists mainly in a stable gray allotrope.
Identity
- Name: Arsenic
- Symbol: As
- Atomic number: 33
- Atomic mass: 74.922 u
Position in the periodic table
- Group: 15
- Period: 4
- Category: Metalloid
Physico-chemical properties
- Standard state: Solid (gray arsenic)
- Sublimation point: 615 °C
- Density: 5.73 g/cm³
- Electron configuration: [Ar] 3d¹⁰ 4s² 4p³
Scientific description
Arsenic sublimates at atmospheric pressure and forms several allotropes, including gray, yellow and black arsenic. It is widely used in semiconductors and historically known for its toxicity.
KODO: J6