Térbio (Tb)
Térbio is the chemical element with atomic number 65 and symbol Tb. It is a lantanídeo in period 6, with a standard atomic weight of 158.93 u.
Dados essenciais
- Z
- 65
- Atomic weight
- 158.93 u
- Category
- lantanídeo
- State at 298 K
- Solid
- Occurrence
- primordial
- Discovered
- 1843
- CAS
- 7440-27-9
Propriedades medidas
| Property | Value | Source |
|---|---|---|
| Melting point | 1,629 K | National Center for Biotechnology Information (NIH) |
| Boiling point | 3,503 K | National Center for Biotechnology Information (NIH) |
| Density stp | 8.23 g/cm³ | National Center for Biotechnology Information (NIH) |
| Atomic radius empirical | 221 pm | National Center for Biotechnology Information (NIH) |
| Ionization energy 1st | 565.8 kJ/mol | National Center for Biotechnology Information (NIH) |
Configuração eletrónica
- Noble gas notation
- [Xe] 4f⁹ 6s²
- Full notation
- 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f⁹ 5s² 5p⁶ 6s²
- Electrons per shell
- 2, 8, 18, 27, 8, 2