Elements / 71
71Lu174.97
Lutetium
Transition metal · d-block · ring P · spoke 3
Lutetium is element 71, a transition metal. It sits on ring P (period 6) on spoke 3. Follow that spoke toward the center and out again to find its chemical relatives.
Properties
| Density | 9.84 g/cm³ | Terrain → |
|---|---|---|
| Melting point | 1,925 K · 1,652 °C | Terrain → |
| Boiling point | 3,675 K · 3,402 °C | Terrain → |
| Electronegativity | 1.27 | Terrain → |
| First ionization energy | 524 kJ/mol | Terrain → |
| Atomic weight | 174.967 u | Terrain → |
| Crustal abundance | 0.8 ppm | Terrain → |
| Discovered | 1906 | 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
- After a priority dispute over its 1907 discovery, many German scientists called it cassiopeium until the 1950s.
- Named for the Latin name of Paris; a therapy using one of its isotopes was FDA approved for prostate cancer in 2022.
Checked against en.wikipedia.org.
Spoke 3
Ring P (period 6)
Play with Lutetium
Watch it fly into its seat, or raise the whole spiral into a landscape and see where it peaks.