Stable isotope Antimony (Sb)

Isotope Z(p) N(n) Atomic Mass Natural Abundance Enrichment Level Chemical Form
Sb-121 51 60 120.903822 57.30% >99.00% Metal
Sb-121 51 60 120.903822 57.30% >99.00% Oxide
Sb-123 51 62 122.904215 42.70% >98.00% Metal
Sb-123 51 62 122.904215 42.70% 94.00-98.00% Oxide

Properties of Antimony

Name Antimony
Symbol Sb
Atomic number 51
Atomic weight 121.75
Standard state Solid at 298 °K
CAS Registry ID 7440-36-0
Group in periodic table 15
Group name Pnictogen
Period in periodic table 5
Block in periodic table p-block
Color Silvery lustrous gray
Classification Semi-metallic
Melting point 630.5 °C
Boiling point 1635 °C
Thermal conductivity 24 W/(m·K)
Electrical resistivity 40 μΩ·cm
Electronegativity 1.82
Specific heat 207 J/(kg·K)
Heat of vaporization 195.2 kJ·mol-1
Heat of fusion 200 kJ·mol-1
Density of liquid 6.53 g/cm3 at 630.5 °C
Density of solid 6.697 g/cm3
Electronic configuration [Kr]4d105s25p3
Atomic radius 1.41 Å
Covalent radius Sb3+: 1.21 Å
Oxidation states -3, 0, +3, +5