Elements / 27
27Co58.933
Cobalt
Transition metal · d-block · ring N · spoke 9
Cobalt is element 27, a transition metal. It sits on ring N (period 4) on spoke 9. Follow that spoke toward the center and out again to find its chemical relatives.
Properties
| Density | 8.9 g/cm³ | Terrain → |
|---|---|---|
| Melting point | 1,768 K · 1,495 °C | Terrain → |
| Boiling point | 3,200 K · 2,927 °C | Terrain → |
| Electronegativity | 1.88 | Terrain → |
| First ionization energy | 760 kJ/mol | Terrain → |
| Atomic weight | 58.9332 u | Terrain → |
| Crustal abundance | 25 ppm | Terrain → |
| Discovered | 1735 | 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
- German miners named its ore after a devilish mountain spirit, blaming it when the ore would not yield silver.
- Georg Brandt isolated it in the 1730s. In 1802 Thenard roasted its phosphate with alumina to make a famous blue pigment.
Checked against sciencefriday.com.
Spoke 9
Ring N (period 4)
Play with Cobalt
Watch it fly into its seat, or raise the whole spiral into a landscape and see where it peaks.