Atomic Properties
- Atomic Number
- 33
- Atomic Mass
- 74.9220 u
- Electron Configuration
- [Ar] 3d10 4s2 4p3
- Electronegativity
- 2.18
- Block
- p-block
- Group
- 15
- Period
- 4
Physical Properties
- Phase (STP)
- solid
- Melting Point
- 1090.00 K
- Boiling Point
- 887.00 K
- Density
- 5.7270 g/cm³
About Arsenic
Toxic metalloid; historically used as poison; used in semiconductors.
Isotopes of Arsenic
Arsenic has 1 naturally occurring isotope.
| Isotope | Mass Number | Atomic Mass (u) | Abundance | Type |
|---|---|---|---|---|
| 75As | 75 | 74.92159457 | 100.00% | Stable |
Data source: NIH PubChem (aggregated from IUPAC, NIST)