The Periodic Table of Elements
1
H
Hydrogen
1.00794(4) amu
Additional Information:
| State | Group Block | Density | Atomic Radius | Electron Affinity | Ionization Energy | Melting Point | Boiling Point | Year Discovered |
|---|---|---|---|---|---|---|---|---|
| gas | nonmetal | 0.0000899 kg/L | 37 pm | -73 | 1312 kJ/mol | 14 °K | 20 °K | 1766 |
