51
121.76
Sb
Antimony
Identification
CAS Number: 7440-36-0
Discoverer: Known to the ancients.
Properties
Atomic Dimensions
Atomic Radius: 145 pm →
Atomic Radius (Rahm): 246 pm
Covalent Radius: 139 pm →Van der Waals Radius: 206 pm
Metallic Radius: 139 pm
Atomic Volume: 18.4 cm³/mol
Lattice Constant: 4.51 Å
Thermodynamics
Electronic Structure
Electron Config: [Kr] 4d10 5s2 5p3
Block: p
Period: 5 →Group: 15 →Electronegativity: 2.05 →Electron Affinity: 1.046 eV →Oxidation States: -3, +3, +5
Abundance & Geochemistry
Crust Abundance: 0.2 mg/kg
Sea Abundance: 0.00023999999999999998 mg/L
Geochemical Class: semi-volatile
Goldschmidt Class: chalcophile
About
Element of group 15. Multiple allotropic forms. The stable form of antimony is a blue-white metal. Yellow and black antimony are unstable non-metals. Used in flame-proofing, paints, ceramics, enamels, and rubber. Attacked by oxidizing acids and halogens. First reported by Tholden in 1450.
Isotopes
Sb-121 121 57.21%
Sb-123 123 42.79%
