51
Sb
Antimony
Antimony
Antimony (Sb)
Metalloids · Solid · Period 5 · Group 15
Element Properties
- Atomic Number
- 51
- Symbol
- Sb
- Atomic Mass
- 121.76
- Category
- Metalloids
- Standard State
- Solid
- Period
- 5
- Group
- 15
- Electronegativity
- 2.05
- Atomic Radius
- 206
- Ionization Energy
- 8.64
- Electron Affinity
- 1.07
- Oxidation States
- +5, +3, -3
- Melting Point
- 903.78 K (630.63 °C)
- Boiling Point
- 1860 K (1586.85 °C)
- Density
- 6.685
- Electron Configuration
- [Kr]5s2 4d10 5p3
- Year Discovered
- Ancient
Electron shells
[Kr]5s2 4d10 5p3
Electrons are arranged in shells (principal energy levels) around the nucleus. The diagram is a schematic — orbitals in the same shell are not drawn separately.
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Frequently asked questions
What is the atomic number of Antimony?
The atomic number of Antimony is 51, which equals the number of protons in its nucleus.
What is the atomic mass of Antimony?
The atomic mass of Antimony is approximately 121.76 u (one twelfth of the mass of a carbon-12 atom).
What is the electron configuration of Antimony?
The electron configuration of Antimony is [Kr]5s2 4d10 5p3.
Where is Antimony in the periodic table?
Antimony is located in period 5, group 15.
When was Antimony discovered?
Antimony has been known since antiquity.
Related elements
Same group
7
N
Nitrogen
14.007
15
P
Phosphorus
30.974
33
As
Arsenic
74.922
83
Bi
Bismuth
208.98
115
Mc
Moscovium
290.196