Cezio (Cs) is a chemical element belonging to the category Alkali metal, with atomic number 55 and atomic mass 132.9055 u. This sheet describes its fundamental properties, periodic position and physical characteristics.
Identity
- Name: Cezio
- Symbol: Cs
- Atomic number: 55
- Atomic mass: 132.9055 u
Position in the periodic table
- Group: 1
- Period: 6
- Category: Alkali metal
Physico-chemical properties
- Standard state: Solid (almost liquid near room temperature)
- Melting point: Very low (≈28.5°C)
- Density: 1.87 g/cm³
- Electron configuration: [Xe] 6s¹
Scientific description
Cezio is a chemical element with symbol Cs and atomic number 55. It belongs to the category of Alkali metal and occupies group 1 and period 6. Its standard atomic mass is 132.9055 u.