51
121.76 u
Sb
Antimony
Metalloid
Atomic Structure
Physical State
Group
15
Period
5
Block
p
Electron Configuration
[Kr] 4d¹⁰ 5s² 5p³
Physical Properties
Atomic Mass:
121.76 u
Electronegativity:
2.05
Atomic Radius:
206 pm
Ionization Energy:
8.64 eV
Density:
6.697 g/cm³
Melting Point:
903.78 K
Boiling Point:
1860 K
Historical Information
Discovered By:
Ancient
Year Discovered:
Unknown