78 Pt
Transition metal
Platinum
Used in jewelry and converters.
Properties of Platinum
- Atomic number (Z)
- 78
- Symbol
- Pt
- Atomic mass
- 195.08 g/mol
- Category
- Transition metal
- Group
- 10
- Period
- 6
- Electron configuration
- [Xe] 4f¹⁴ 5d⁹ 6s¹
- Electronegativity (Pauling)
- 2.28
- Atomic radius
- 177 pm
- First ionization energy
- 870 kJ/mol
- Melting point
- 2041.4 K (1768.3 °C)
- Boiling point
- 4098 K (3824.8 °C)
- Density
- 21.46 g/cm³
- Phase at 25 °C
- Solid
- Discovered
- Discovered in 1735