85At
Astatine
Halogen
Properties of Astatine
- Atomic number (Z)
- 85
- Symbol
- At
- Name
- Astatine
- Atomic mass
- 210 u
- Period
- 6
- Group
- 17
- Family
- Halogens
- Classification
- Halogen
- Electron configuration
- [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵
About Astatine
Astatine is a chemical element with symbol At and atomic number 85 (atomic mass of about 210 u). It is classified as a halogen on the periodic table.
On the periodic table, Astatine is located in period 6, in group 17, belonging to the halogens family. An element's position reveals trends in its properties, such as atomic radius, electronegativity and metallic character.
The electron configuration of Astatine is [Xe] 4f¹⁴ 5d¹⁰ 6s² 6p⁵, which determines how it forms chemical bonds and takes part in reactions.