Pt
Platinum
Platinum is a chemical element with the symbol Pt and atomic number 78. It has a standard atomic weight of 195.08, sits in period 6 and group 10, and is classified as a transition metal.
Properties
| Symbol | Pt |
|---|---|
| Atomic number | 78 |
| Standard atomic weight | 195.08 |
| Category | Transition metal |
| Group | 10 |
| Period | 6 |
| Electron configuration | [Xe] 4f14 5d9 6s1 |
| Outer-shell electrons | 2 |
The figure of 195.08 is a standard atomic weight.
Compounds containing platinum
1 of the compounds in this reference contain Pt, listed by the fraction of their mass it makes up.
| Compound | Formula | Atoms | % by mass |
|---|---|---|---|
| cisplatin | Cl2H6N2Pt | 1 | 65.0% |
Calculate with platinum
- Molar mass of any formula containing it
- Electron configuration, including ions
- Effective nuclear charge by Slater's rules
- Average atomic mass from isotope abundances
Group 10
Atomic weights are the IUPAC 2021 standard values, abridged to the conventional five significant figures. Group, period, category and electron configuration are derived from the atomic number rather than stored, so they cannot drift out of step with it.