Platina (Pt)
Platina is the chemical element with atomic number 78 and symbol Pt. It is a metal de transição in period 6, group 10, with a standard atomic weight of 195.08 u.
Dados essenciais
- Z
- 78
- Atomic weight
- 195.08 u
- Category
- metal de transição
- State at 298 K
- Solid
- Occurrence
- primordial
- Discovered
- 1557
- CAS
- 7440-06-4
Propriedades medidas
| Property | Value | Source |
|---|---|---|
| Electronegativity | 2.28 | National Center for Biotechnology Information (NIH) |
| Melting point | 2,041.55 K | National Center for Biotechnology Information (NIH) |
| Boiling point | 4,098 K | National Center for Biotechnology Information (NIH) |
| Density stp | 21.46 g/cm³ | National Center for Biotechnology Information (NIH) |
| Atomic radius empirical | 209 pm | National Center for Biotechnology Information (NIH) |
| Ionization energy 1st | 868.4 kJ/mol | National Center for Biotechnology Information (NIH) |
| Electron affinity | 205.3 kJ/mol | National Center for Biotechnology Information (NIH) |
Configuração eletrónica
- Noble gas notation
- [Xe] 4f¹⁴ 5d⁹ 6s¹
- Full notation
- 1s² 2s² 2p⁶ 3s² 3p⁶ 3d¹⁰ 4s² 4p⁶ 4d¹⁰ 4f¹⁴ 5s² 5p⁶ 5d⁹ 6s¹
- Electrons per shell
- 2, 8, 18, 32, 17, 1