Elements / 84
84Po[209]
Polonium
Post-transition metal · p-block · ring P · spoke 16
Polonium is element 84, a post-transition metal. It sits on ring P (period 6) on spoke 16, the chalcogens. Follow that spoke toward the center and out again to find its chemical relatives.
Properties
| Density | 9.2 g/cm³ | Terrain → |
|---|---|---|
| Melting point | 527 K · 254 °C | Terrain → |
| Boiling point | 1,235 K · 962 °C | Terrain → |
| Electronegativity | 2.00 | Terrain → |
| First ionization energy | 812 kJ/mol | Terrain → |
| Atomic weight | 209 u | Terrain → |
| Crustal abundance | 2.0 × 10⁻¹⁰ ppm | Terrain → |
| Discovered | 1898 | 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
- The Soviet Moon rovers Lunokhod 1 (1970) and Lunokhod 2 (1973) kept warm through lunar nights with its heat.
- Found by the Curies in 1898 and named for Marie's homeland, to publicize its lack of independence.
Checked against en.wikipedia.org.
Spoke 16: Chalcogens
Ring P (period 6)
Play with Polonium
Watch it fly into its seat, or raise the whole spiral into a landscape and see where it peaks.