Bario (Ba)
Bario is the chemical element with atomic number 56 and symbol Ba. It is a metal alcalinotérreo in period 6, group 2, with a standard atomic weight of 137.33 u.
Datos esenciales
- Z
- 56
- Atomic weight
- 137.33 u
- Category
- metal alcalinotérreo
- State at 298 K
- Solid
- Occurrence
- primordial
- Discovered
- 1808
- CAS
- 7440-39-3
Propiedades medidas
| Property | Value | Source |
|---|---|---|
| Electronegativity | 0.89 | National Center for Biotechnology Information (NIH) |
| Melting point | 1,000 K | National Center for Biotechnology Information (NIH) |
| Boiling point | 2,170 K | National Center for Biotechnology Information (NIH) |
| Density stp | 3.62 g/cm³ | National Center for Biotechnology Information (NIH) |
| Atomic radius empirical | 268 pm | National Center for Biotechnology Information (NIH) |
| Ionization energy 1st | 502.9 kJ/mol | National Center for Biotechnology Information (NIH) |
Configuración electrónica
- Noble gas notation
- [Xe] 6s²
- Full notation
- 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 5s² 5p⁶ 6s²
- Electrons per shell
- 2, 8, 18, 18, 8, 2