Atomic Properties of Pd
- Atomic Number of Pd
- 46
- Atomic Mass of Pd
- 106.4200 u
- Electron Configuration
- [Kr] 4d10
- Electronegativity
- 2.20
- Block
- d-block
- Group
- 10
- Period
- 5
Palladium (Pd) is element 46 on the periodic table. Atomic mass of Pd: 106.4200 u. Pd is in period 5, group 10. Melting point of Pd: 1828.05 K.Density of Pd: 12.02 g/cm³.
Palladium in everyday life and industry
Palladium has no known biological role. Some palladium compounds can cause allergic reactions. Palladium dental alloys are generally well-tolerated.
Discovered by William Wollaston in England, 1803
Name origin: Named after the asteroid, Pallas, discovered in 1803.
Soft white ductile transition element. Found with some copper and nickel ores. Does not react with oxygen at normal temperatures. Dissolves slowly in hydrochloric acid. Discovered in 1803 by W.H. Wollaston.
Palladium has 6 naturally occurring isotopes, plus 3 notable radioactive isotopes.
| Isotope | Atomic Mass (u) | Abundance | Half-Life | Decay Mode |
|---|---|---|---|---|
| 10246Pd (Pd-102)Palladium-102 isotope | 101.9056022 | 1.020% | Stable | No observed decay |
| 10346Pd (Pd-103)Palladium-103 isotope | 102.906087 | 0% | 16.99 days | EC |
| 10446Pd (Pd-104)Palladium-104 isotope | 103.9040305 | 11.14% | Stable | No observed decay |
| 10546Pd (Pd-105)Palladium-105 isotope | 104.9050796 | 22.33% | Stable | No observed decay |
| 10646Pd (Pd-106)Palladium-106 isotope | 105.9034804 | 27.33% | Stable | No observed decay |
| 10746Pd (Pd-107)Palladium-107 isotope | 106.905133 | 0% | 6.5 million years | β⁻ |
| 10846Pd (Pd-108)Palladium-108 isotope | 107.9038916 | 26.46% | Stable | No observed decay |
| 10946Pd (Pd-109)Palladium-109 isotope | 108.90595 | 0% | 13.7 hours | β⁻ |
| 11046Pd (Pd-110)Palladium-110 isotope | 109.9051722 | 11.72% | Stable | No observed decay |
Data source: NIH PubChem (aggregated from IUPAC, NIST)
Selected uses of notable Palladium isotopes.
Brachytherapy for prostate cancer; eye plaque therapy; cancer seed implants
Extinct radionuclide dating; meteorite chronology; early solar system studies
Industrial radiography; gamma ray source
Applications reference: IUPAC Isotopes Matter and NIH PubChem.
Used as a substitue for silver in dental items and jewelry. The pure metal is used as the delicate mainsprings in analog wristwatches. Also used in surgical instruments and as catalyst .
Obtained with platinum, nickel, copper and mercury ores.
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The chemistry behind Palladium: