#51
Sb
Antimony
121.76 u

Antimony

Metalloid
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Properties

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
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