Hydrogen vs Boron
| Property | H Hydrogen | B Boron |
|---|---|---|
| Atomic number | 1 | 5 |
| Symbol | H | B |
| Name | Hydrogen | Boron |
| Category | nonmetal | metalloid |
| Standard Atomic Weight | 1.007975 u | 10.8135 u |
| Period | 1 | 2 |
| Group | 1 | 13 |
| Block | s | p |
| Phase at STP | gas | solid |
| Electron configuration | 1s1 | [He]2s22p1 |
| Oxidation states | [-1, 1] | [-5, -1, 0, 1, 2, 3] |
| Electronegativity (Pauling) | 2.2 | 2.04 |
| Electron affinity | 0.75419 eV | 0.27972 eV |
| Density | 0.08988 kg/m³ | 2370 kg/m³ |
| Melting point | -259.34 °C | 2074.85 °C |
| Boiling point | -252.87 °C | 3999.85 °C |
| Discovery year | 1766 | 1808 |