51 Sb 121.76
Antimony
metalloid
Properties
- Atomic number
- 51
- Atomic mass
- 121.76 u
- Category
- metalloid
- Group
- 15
- Period
- 5
- Block
- p-block
- State (room temp)
- Solid
- Outer-shell electrons
- 5
- Electronegativity
- 2.05 (Pauling)
- Density
- 6.697 g/cm³
- Melting point
- 630.63 °C
- Boiling point
- 1634.85 °C
Electron configuration
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d¹⁰ 4p⁶ 5s² 4d¹⁰ 5p³
Noble-gas shorthand: [Kr] 4d¹⁰ 5s² 5p³
Electrons per shell: 2, 8, 18, 18, 5, which is 5 in the outermost shell.
Related: electron configuration, the Bohr model, valence electrons.
About Antimony
Antimony is a chemical element with symbol Sb (from Latin:stibium) and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite (Sb2S3). Antimony compounds have been known since ancient times and were used for cosmetics; metallic antimony was also known, but it was erroneously identified as lead upon its discovery.
- Discovered by unknown, before 3000 BC
- Appearance: silvery lustrous gray
Antimony: frequently asked questions
- What is Antimony?
- Antimony (Sb) is the chemical element with atomic number 51. It is a metalloid, with properties between metals and nonmetals.
- What is the atomic number of Antimony?
- Antimony's atomic number is 51, which means every Antimony atom has 51 protons in its nucleus.
- What is the electron configuration of Antimony?
- The electron configuration of Antimony is 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d10 5p3 (noble-gas shorthand: [Kr] 4d10 5s2 5p3). Its electrons are arranged in shells of 2, 8, 18, 18, 5, with 5 in the outermost shell.
- Is Antimony a metal or a nonmetal?
- Antimony is a metalloid, with properties between metals and nonmetals.
- What group and period is Antimony in?
- Antimony is in group 15 and period 5 of the periodic table.
- Is Antimony a solid, liquid, or gas?
- At room temperature, Antimony is a solid.
Position in the periodic table
Data compiled from Wikipedia, PubChem, and IUPAC. Source.