51
Sb
121.76
Antimony (Sb)
Element 51 · Period 5 · Group 15
metalloid
solid at room temp
p-block
About Antimony
Metalloid used in lead-acid batteries, flame retardants, and semiconductors.
Physical Properties
Atomic Mass
121.76 u
State at 25°C
Solid
Melting Point
630.63 °C
Boiling Point
1587 °C
Density
6.697 g/cm³
Magnetism
Diamagnetic
Atomic Properties
Electron Configuration
[Kr] 4d¹⁰ 5s² 5p³
Electron Shells
2, 8, 18, 18, 5
Electronegativity
2.05
Atomic Radius
133 pm
Ionization Energy
834 kJ/mol
Oxidation States
-3, +3, +5
Discovery & History
Discovered By
Ancient
Discovery Year
Ancient
Named By
Ancient
Name origin: Greek: anti + monos (not alone)
Frequently Asked Questions
- Is Antimony a metal, nonmetal, or metalloid?
- Antimony is classified as a metalloid.
- What state is Antimony in at room temperature?
- Antimony is a solid at standard room temperature (25°C).
- What is the atomic mass of Antimony?
- Antimony has an atomic mass of 121.76 atomic mass units (u).
- Who discovered Antimony?
- Antimony was discovered by Ancient.
- Where is Antimony on the periodic table?
- Antimony is element number 51, located in period 5 and group 15.