| Element | Hydrogen | Symbol | H |
| Atomic Number | 1 | Molar Mass | 1.0079 gmol-1 |
| Electron Configuration | 1s1 | Normal State | gas/nonmetal |
| Density @STP | 0.09x10-3 g cm-3 | Melting Point | -259oC |
| Boiling Point | -253oC | Stable Isotopes | 1H, 2H |
| Atomic Radius | 78 pm | Ionic Radius | 195 (1-) pm |
| Electronegativity (Pauling) | 2.2 | Ionization Energy (1st) | 1312 kJ mol-1 |
| Ionization Energy (2nd) | n/a kJ mol-1 | Ionization Energy (3rd) | n/a kJ mol-1 |
| Molar Heat Capacity | 20.8 J K-1mol-1 | Standard Molar Entropy | 114.7 J K-1mol-1 |
| Enthalpy of Fusion | 0.12 kJ mol-1 | Enthalpy of Vapourization | 0.46 kJ mol-1 |