Copper vs Protactinium
| Property | Cu Copper | Pa Protactinium |
|---|---|---|
| Atomic number | 29 | 91 |
| Symbol | Cu | Pa |
| Name | Copper | Protactinium |
| Category | transition-metal | actinide |
| Standard Atomic Weight | 63.546 u | 231.03588 u |
| Period | 4 | 7 |
| Group | 11 | N/A |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Ar]4s13d10 | [Rn]7s25f26d1 |
| Oxidation states | [-2, 0, 1, 2, 3, 4] | [2, 3, 4, 5] |
| Electronegativity (Pauling) | 1.9 | 1.5 |
| Electron affinity | 1.235 eV | 0.123 eV |
| Density | 8933 kg/m³ | 1.537000e+4 kg/m³ |
| Melting point | 1084.62 °C | 1571.85 °C |
| Boiling point | 2561.85 °C | -273.15 °C |
| Discovery year | N/A | 1913 |