Pd
Palladium can absorb up to 900 times its own volume of hydrogen gas.
Physical Properties
| Atomic Mass | 106.42 u |
| Density | 12.02 g/cm³ |
| Melting Point | 1828.05 K |
| Boiling Point | 3236.0 K |
| Appearance | Silvery-white metallic |
| State at Room Temp | Solid |
Chemical Properties
| Electronegativity | 2.2 (Pauling) |
| 1st Ionization Energy | 804.4 kJ/mol |
| Electron Affinity | 53.7 kJ/mol |
| Oxidation States | +2, +4 |
Atomic Properties
| Electron Configuration | [Kr] 4d10 |
| Atomic Radius | 137.0 pm |
| Covalent Radius | 139.0 pm |
| Van der Waals Radius | 163.0 pm |
Discovery
| Discovered By | William Hyde Wollaston |
| Discovery Year | 1803 |
| Location | London, England |
| Named After | Named after the asteroid Pallas |
About Palladium
Palladium is a rare, lustrous, silvery-white metal with the unusual ability to absorb up to 900 times its volume of hydrogen. It has the lowest melting point and density of the platinum group metals. It has an anomalous electron configuration with no 5s electrons.
Uses & Applications
Catalytic converters, electronics, dentistry, jewelry (white gold alloy), and hydrogen purification.
Fun Fact
Palladium can absorb 900 times its own volume of hydrogen gas, acting like a metallic sponge at the atomic level.
Isotopes
| Mass Number | Abundance | Half-Life | Stable |
| 104 | 0.1114% | - | Yes |
| 105 | 0.2233% | - | Yes |
| 106 | 0.2733% | - | Yes |
| 108 | 0.2646% | - | Yes |
Electron Configuration
[Kr] 4d10