Platinum (Pt) — Element 78: Properties & Data | Aladdin Scientific
Platinum(Pt) — Element 78
Platinum (Pt) is a transition metal with atomic number 78 and atomic mass 195.08. It has melting point 2041.55 K (1768 °C), boiling point 4098 K (3825 °C), density 21.46 g/cm³. It sits in group 10 and period 6 of the periodic table and was discovered in 1735.
Key facts
| Atomic mass | 195.0800 u |
|---|---|
| Electron configuration | [Xe]6s1 4f14 5d9 |
| Oxidation states | +4, +2 |
| Electronegativity (Pauling) | 2.28 |
| Atomic radius (van der Waals) | 209 pm |
| Ionization energy | 9 eV |
| Electron affinity | 2.128 eV |
| Melting point | 2041.55 K |
| Boiling point | 4098 K |
| Density | 21.46 g/cm³ |
| Standard state | Solid |
| Year discovered | 1735 |
Frequently asked questions
What is the electron configuration of platinum?
The ground-state electron configuration of platinum is [Xe]6s1 4f14 5d9.
What group and period is platinum in?
Platinum (Pt) is in group 10 and period 6 of the periodic table, classified as a transition metal.
What is the melting point of platinum?
Platinum melts at 2041.55 K (1768 °C).
What is the standard state of platinum?
Platinum is a solid at standard temperature and pressure.
Related elements
About this data: property values compiled from IUPAC Standard Atomic Weights (2021), the NIST Atomic Spectra Database, and PubChem. Curated by the Aladdin Scientific technical team. Last reviewed: .