Argon vs Praseodymium
| Property | Ar Argon | Pr Praseodymium |
|---|---|---|
| Atomic number | 18 | 59 |
| Symbol | Ar | Pr |
| Name | Argon | Praseodymium |
| Category | noble-gas | lanthanide |
| Standard Atomic Weight | 39.948 u | 140.90766 u |
| Period | 3 | 6 |
| Group | 18 | N/A |
| Block | p | s |
| Phase at STP | gas | solid |
| Electron configuration | [Ne]3s23p6 | [Xe]6s24f3 |
| Oxidation states | [0] | [0, 1, 2, 3, 4, 5] |
| Electronegativity (Pauling) | N/A | 1.13 |
| Electron affinity | -1 eV | 0.962 eV |
| Density | 1.7837 kg/m³ | 6770 kg/m³ |
| Melting point | -189.35 °C | 930.85 °C |
| Boiling point | -185.85 °C | 3519.85 °C |
| Discovery year | 1894 | 1885 |