Titanium vs Protactinium
| Property | Ti Titanium | Pa Protactinium |
|---|---|---|
| Atomic number | 22 | 91 |
| Symbol | Ti | Pa |
| Name | Titanium | Protactinium |
| Category | transition-metal | actinide |
| Standard Atomic Weight | 47.867 u | 231.03588 u |
| Period | 4 | 7 |
| Group | 4 | N/A |
| Block | s | s |
| Phase at STP | solid | solid |
| Electron configuration | [Ar]4s23d2 | [Rn]7s25f26d1 |
| Oxidation states | [-2, -1, 0, 1, 2, 3, 4] | [2, 3, 4, 5] |
| Electronegativity (Pauling) | 1.54 | 1.5 |
| Electron affinity | 0.0755 eV | 0.123 eV |
| Density | 4500 kg/m³ | 1.537000e+4 kg/m³ |
| Melting point | 1667.85 °C | 1571.85 °C |
| Boiling point | 3286.85 °C | -273.15 °C |
| Discovery year | 1791 | 1913 |