Symbol
As
Atomic Number
33
Atomic Mass
74.922
Protons
33
Neutrons
42
Electrons
33
Type
Metalloid
Isotopes
Arsenic-75
Discovery Year
Prehistoric
Discovered By
Unknown
Group
15
Period
4
Boiling Point
613°F
Melting Point
817°F
Electron Configuration
[Ar] 3d¹⁰ 4s² 4p³
Density (g/cm³)
5.727
Crystal Structure
Rhombic
Magnetism
Diamagnetic
Abundance in Earth's Crust
0.0001%
Phase at Room Temperature
Solid