Hydrogen
Nonmetal| Atomic number | 1 |
|---|---|
| Category | Nonmetal |
| Atomic mass | 1.008 |
| Electron configuration | 1s¹ |
| Oxidation states | −1, +1 |
| Electronegativity | 2.2 |
| Melting point | -259 °C |
| Boiling point | -253 °C |
| Density | 0 g/cm³ |
| Crystal structure | Hexagonal (solid) |
| Group | 1 |
| Period | 1 |
| Block | s |
| Discovered | 1,766 |
| Crustal abundance | 1,400 ppm |
