Radium — Ra
The chemical element Radium is an element of type Alkaline earth metal with the symbol Ra. It has an atomic mass of 226 u and an electronic configuration of [Rn] 7s2.
Synthétique
Radioactif
Liquide
Gaz
1140°
8
18
32
18
8
2
- Atomic number
- 88
- Atomic mass
- 226
- Symbol
- Ra
- Melting point
- 700
- Boiling point
- 1140
- Density
- 5.5
- Period
- 7
- Group
- 2
- Discovery
- 1898 Pierre and Marie Curie
- Abundance
- 0.001
- Radius
- 0
- Electronegativity
- 0.9
- Ionization
- 5.2784
- Isotope
- 15
- Electronic configuration
- [Rn] 7s2
- Oxidation state
- 2
- Electron
- 2,8,18,32,18,8,2