Elements / 1
1H1.008
Hydrogen
Reactive nonmetal · s-block · ring K · spoke 1
Hydrogen is element 1, a reactive nonmetal. Hydrogen sits at the very center of the spiral. From there it touches the alkali metals on one side and the halogens on the other, which is exactly how it behaves.
Properties
| Density | 0.09 g/L (as a gas) | Terrain → |
|---|---|---|
| Melting point | 14 K · -259 °C | Terrain → |
| Boiling point | 20 K · -253 °C | Terrain → |
| Electronegativity | 2.20 | Terrain → |
| First ionization energy | 1,312 kJ/mol8th highest ionization energy of 103 | Terrain → |
| Atomic weight | 1.008 u | Terrain → |
| Crustal abundance | 1,400 ppm10th most abundant in Earth's crust of 92 | Terrain → |
| Discovered | 1671 | 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
- A shy Englishman who spoke to his female servants only by notes described it in a 1766 paper as inflammable air.
- The lightest element and about 75% of all normal matter; it filled the Hindenburg, which caught fire over New Jersey in 1937.
Checked against en.wikipedia.org, en.wikipedia.org.
Spoke 1: Alkali metals
Ring K (period 1)
Play with Hydrogen
Watch it fly into its seat, or raise the whole spiral into a landscape and see where it peaks.