| Atomic number |
|
1 |
| Symbol |
|
H |
| Atomic weight |
|
1.00794 |
| Density [g/l] |
|
0.084 |
| Melting point [°C] |
|
-259.2 |
| Boiling point [°C] |
|
-252.9 |
| 1st Ionization energy [eV] |
|
13.598 |
| Electronic configuration |
|
1s |
| Oxidation number (most
stable) |
|
1, -1 |
| Atomic radius [pm] |
|
37.3 |
| Ionic radius [pm] |
|
208 (1-) |
| Abundance in crustal rocks [ppm] |
|
1520 |
| Origin of the name |
|
(lat./greek)
hydrogenium, meaning
water generator |
| Discovery |
|
1766 by Henry Cavendish |
| Uses |
|
for the technical hydrogenation of fats and
oils and for chemical synthesis like the one of methanol, in former times
for filling of airships, today replaced by helium. In future hydrogen may
be used as a replacement for fossil fuels. |
 |
|
|
1 H
Hydrogen
