Platinum
Transition Metal
Platinum (Pt) is a chemical element with atomic number 78, classified as a transition metal. At room temperature it is a solid. It was discovered in 1735 by Antonio de Ulloa.
Properties
- Atomic number
- 78
- Atomic mass
- 195.08 u
- Category
- Transition Metal
- Group
- 10
- Period
- 6
- Block
- d-block
- Electron configuration
- [Xe] 4f¹⁴ 5d⁹ 6s¹
- Phase at STP
- Solid
- Density
- 21.46 g/cm³
- Melting point
- 2041.4 K (1768.3 °C)
- Boiling point
- 4098 K (3824.8 °C)
- Electronegativity
- 2.28
- Atomic radius
- 177 pm
- Ionization energy
- 8.959 eV
- Discovery
- 1735 · Antonio de Ulloa
Common uses
Catalytic converters, jewelry, electronics, cancer treatment
Did you know?
More valuable than gold and essential for reducing car emissions.