Radium
Radium (Ra) is a chemical element belonging to the category Alkaline earth metal, with atomic number 88 and atomic mass 226.0000 u. This sheet describes its fundamental properties, periodic position and physical characteristics.
Identity
- Name: Radium
- Symbol: Ra
- Atomic number: 88
- Atomic mass: 226.0000 u
Position in the periodic table
- Group: 2
- Period: 7
- Category: Alkaline earth metal
Physico-chemical properties
- Standard state: Solid
- Melting point: Medium (650°C to 1280°C)
- Density: Very high
- Electron configuration: [Rn] 7s²
Scientific description
Radium is a chemical element with symbol Ra and atomic number 88. It belongs to the alkaline earth metals and occupies group 2 and period 7. Its standard atomic mass is 226.0000 u.
KODO: P7