55Cs
Caesium
Alkali metal
Properties of Caesium
- Atomic number (Z)
- 55
- Symbol
- Cs
- Name
- Caesium
- Atomic mass
- 132.905 u
- Period
- 6
- Group
- 1
- Family
- Alkali metals
- Classification
- Alkali metal
- Electron configuration
- [Xe] 6s¹
About Caesium
Caesium is a chemical element with symbol Cs and atomic number 55 (atomic mass of about 132.905 u). It is classified as a alkali metal on the periodic table.
On the periodic table, Caesium is located in period 6, in group 1, belonging to the alkali metals family. An element's position reveals trends in its properties, such as atomic radius, electronegativity and metallic character.
The electron configuration of Caesium is [Xe] 6s¹, which determines how it forms chemical bonds and takes part in reactions.