Compare Element Properties
| Property | H Hydrogen | ? N/A |
|---|---|---|
| Atomic number | 1 | N/A |
| Symbol | H | N/A |
| Name | Hydrogen | N/A |
| Category | nonmetal | N/A |
| Standard Atomic Weight | 1.007975 u | N/A |
| Period | 1 | N/A |
| Group | 1 | N/A |
| Block | s | N/A |
| Phase at STP | gas | N/A |
| Electron configuration | 1s1 | N/A |
| Oxidation states | [-1, 1] | N/A |
| Electronegativity (Pauling) | 2.2 | N/A |
| Electron affinity | 0.75419 eV | N/A |
| Density | 0.08988 kg/m³ | N/A |
| Melting point | -259.34 °C | N/A |
| Boiling point | -252.87 °C | N/A |
| Discovery year | 1766 | N/A |