Elements / 94
94Pu[244]
Plutonium
Actinide · f-block · ring Q
Plutonium is element 94, an actinide. It is one of the actinides, which the spiral keeps in line on ring Q instead of exiling them to a strip below the table.
Properties
| Density | 19.8 g/cm³6th densest of 99 | Terrain → |
|---|---|---|
| Melting point | 913 K · 639 °C | Terrain → |
| Boiling point | 3,505 K · 3,232 °C | Terrain → |
| Electronegativity | 1.28 | Terrain → |
| First ionization energy | 585 kJ/mol | Terrain → |
| Atomic weight | 244 u | Terrain → |
| Crustal abundance | Not measured | Terrain → |
| Discovered | 1941 | 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
- Its discoverer picked its two-letter symbol as a joke, a nod to the interjection for a very bad smell.
- Named for a world then considered a planet. It powered the Voyager probes and filled the Fat Man bomb dropped on Nagasaki.
Checked against en.wikipedia.org.
Actinides
- Ac Actinium
- Th Thorium
- Pa Protactinium
- U Uranium
- Np Neptunium
- Pu Plutonium
- Am Americium
- Cm Curium
- Bk Berkelium
- Cf Californium
- Es Einsteinium
- Fm Fermium
- Md Mendelevium
- No Nobelium
Ring Q (period 7)
Play with Plutonium
Watch it fly into its seat, or raise the whole spiral into a landscape and see where it peaks.