Hydrogen vs Samarium
| Property | H Hydrogen | Sm Samarium |
|---|---|---|
| Atomic number | 1 | 62 |
| Symbol | H | Sm |
| Name | Hydrogen | Samarium |
| Category | nonmetal | lanthanide |
| Standard Atomic Weight | 1.007975 u | 150.36 u |
| Period | 1 | 6 |
| Group | 1 | N/A |
| Block | s | s |
| Phase at STP | gas | solid |
| Electron configuration | 1s1 | [Xe]6s24f6 |
| Oxidation states | [-1, 1] | [0, 1, 2, 3] |
| Electronegativity (Pauling) | 2.2 | 1.17 |
| Electron affinity | 0.75419 eV | 0.156 eV |
| Density | 0.08988 kg/m³ | 7520 kg/m³ |
| Melting point | -259.34 °C | 1073.85 °C |
| Boiling point | -252.87 °C | 1793.85 °C |
| Discovery year | 1766 | 1878 |