Elements / 49
49In114.82
Indium
Post-transition metal · p-block · ring O · spoke 13
Indium is element 49, a post-transition metal. It sits on ring O (period 5) on spoke 13, the boron group. Follow that spoke toward the center and out again to find its chemical relatives.
Properties
| Density | 7.31 g/cm³ | Terrain → |
|---|---|---|
| Melting point | 430 K · 157 °C | Terrain → |
| Boiling point | 2,345 K · 2,072 °C | Terrain → |
| Electronegativity | 1.78 | Terrain → |
| First ionization energy | 558 kJ/mol | Terrain → |
| Atomic weight | 114.818 u | Terrain → |
| Crustal abundance | 0.25 ppm | Terrain → |
| Discovered | 1863 | 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
- Found in 1863 by a color-blind chemist and his assistant, who saw a bright blue spectral line in ores from Freiberg, Saxony.
- So soft it can be bitten; named for the indigo of its spectrum, it coats flat-panel display glass as a transparent conductive oxide.
Checked against en.wikipedia.org.
Spoke 13: Boron group
Ring O (period 5)
Play with Indium
Watch it fly into its seat, or raise the whole spiral into a landscape and see where it peaks.