Antimony

Metalloid

Symbol: Sb

Atomic Number: 51

Standard State: Solid

Atomic Mass: 121.76

Electron Configuration: [Kr]5s2 4d10 5p3

Electronegativity: 2.05

Atomic Radius: 206

Ionization Energy: 8.64

Melting Point: 903.78

Boiling Point: 1860

Density: 6.685

Year Discovered: Ancient