Elements / 98
98Cf[251]
Californium
Actinide · f-block · ring Q
Californium is element 98, 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 | 15.1 g/cm³ | Terrain → |
|---|---|---|
| Melting point | 1,173 K · 900 °C | Terrain → |
| Boiling point | 1,743 K · 1,470 °C | Terrain → |
| Electronegativity | 1.30 | Terrain → |
| First ionization energy | 608 kJ/mol | Terrain → |
| Atomic weight | 251 u | Terrain → |
| Crustal abundance | Not measured | Terrain → |
| Discovered | 1950 | 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
- Priced at $60 per microgram by 1999, it is used as a portable neutron source for on-the-spot gold and silver prospecting.
- Named after the university and the US state where it was first made in 1950. It helps start up nuclear reactors.
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 Californium
Watch it fly into its seat, or raise the whole spiral into a landscape and see where it peaks.