Symbol
Sb
Atomic Number
51
Atomic Mass
121.76
Protons
51
Neutrons
71
Electrons
51
Type
Metalloid
Isotopes
Antimony-121, Antimony-123
Discovery Year
Prehistoric
Discovered By
Unknown
Group
15
Period
5
Boiling Point
1946°F
Melting Point
1166°F
Electron Configuration
[Kr] 5s² 4d¹⁰ 5p³
Density (g/cm³)
6.697
Crystal Structure
Rhombic
Magnetism
Diamagnetic
Abundance in Earth's Crust
0.0005%
Phase at Room Temperature
Solid