Elements / 5
5B10.81
Boron
Metalloid · p-block · ring L · spoke 13
Boron is element 5, a metalloid. It sits on ring L (period 2) on spoke 13, the boron group. Follow that spoke toward the center and out again to find its chemical relatives.
Properties
| Density | 2.08 g/cm³ | Terrain → |
|---|---|---|
| Melting point | 2,349 K · 2,076 °C | Terrain → |
| Boiling point | 4,200 K · 3,927 °C | Terrain → |
| Electronegativity | 2.04 | Terrain → |
| First ionization energy | 801 kJ/mol | Terrain → |
| Atomic weight | 10.81 u | Terrain → |
| Crustal abundance | 10 ppm | Terrain → |
| Discovered | 1787 | 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 mineral ore, then called tincal, first saw use as a glaze in China circa 300 AD.
- Named after a mineral found in laundry products; it toughens heat-resistant glass and burns with a distinctive green flame.
Checked against en.wikipedia.org.
Spoke 13: Boron group
Ring L (period 2)
Play with Boron
Watch it fly into its seat, or raise the whole spiral into a landscape and see where it peaks.