Oxygen vs Praseodymium
| Property | O Oxygen | Pr Praseodymium |
|---|---|---|
| Atomic number | 8 | 59 |
| Symbol | O | Pr |
| Name | Oxygen | Praseodymium |
| Category | nonmetal | lanthanide |
| Standard Atomic Weight | 15.9994 u | 140.90766 u |
| Period | 2 | 6 |
| Group | 16 | N/A |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [He]2s22p4 | [Xe]6s24f3 |
| Oxidation states | [-2, -1, 0, 1, 2] | [0, 1, 2, 3, 4, 5] |
| Electronegativity (Pauling) | 3.44 | 1.13 |
| Electron affinity | 1.4611 eV | 0.962 eV |
| Density | 1.429 kg/m³ | 6770 kg/m³ |
| Melting point | -218.79 °C | 930.85 °C |
| Boiling point | -182.95 °C | 3519.85 °C |
| Discovery year | 1771 | 1885 |