Elements / 78
78Pt195.08
Platinum
Transition metal · d-block · ring P · spoke 10
Platinum is element 78, a transition metal. It sits on ring P (period 6) on spoke 10. Follow that spoke toward the center and out again to find its chemical relatives.
Properties
| Density | 21.4 g/cm³3rd densest of 99 | Terrain → |
|---|---|---|
| Melting point | 2,041 K · 1,768 °C | Terrain → |
| Boiling point | 4,098 K · 3,825 °C | Terrain → |
| Electronegativity | 2.28 | Terrain → |
| First ionization energy | 870 kJ/mol | Terrain → |
| Atomic weight | 195.085 u | Terrain → |
| Crustal abundance | 0.005 ppm | Terrain → |
| Discovered | 1750 | Terrain → |
Values from open reference data; see sources. "Terrain" opens that property as a 3D landscape across the whole spiral.
Two things you might not know
- Antonio de Ulloa reported it in 1748; the Spanish saw it as a kind of impurity in gold and often threw it away.
- Its name is a Spanish diminutive of the word for silver; it is a key part of catalytic converters and some cancer drugs.
Checked against en.wikipedia.org.
Spoke 10
Ring P (period 6)
Play with Platinum
Watch it fly into its seat, or raise the whole spiral into a landscape and see where it peaks.