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General information about Palladium |
| Palladium |
| Pd |
| 46 |
| Transition Metals |
| 10 |
| 5 |
| d |
| silvery white metallic |
| 106.42 g·mol-1 |
| 1s2 2s2p6 3s2p6d10 4s2p6d10 |
| 2, 8, 18, 18 |
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Physical properties of Palladium |
| solid |
| 12.023 g·cm-3 |
1828.05(K),
1554.9°C, 2830.82°F |
3236(K),
2963°C, 5365°F |
| ? |
| ? |
| 16.74 kJ·mol-1 |
| 362 kJ·mol-1 |
| 25.98 J·mol-1·K-1 |
| 2.2 (Pauling scale) |
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Atomic structure of Palladium |
| 1.79 Å |
| 8.9 cm³/mol |
| 1.28 Å |
| 6.9 |
| Cubic face centered |
| 65 (+4e) 80 (+2e) |
| 4d10 |
| 46 |
| 60 |
| 46 |
| 2, 4 |
| 4d10 |
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Electron dot
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Other languages |
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| Latin: |
Palladium |
| Czech: |
Palladium |
| Croatian: |
Paladij |
| French: |
Palladium |
| German: |
Palladium - s |
| Italian: |
Palladio |
| Norwegian: |
Palladium |
| Portuguese: |
Paládio |
| Spanish: |
Paladio |
| Swedish: |
Palladium |
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| Element |
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Brief description |
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Palladium has a melting point of 1554°C, boiling point of 2970°C, specific gravity of 12.02 (20°C), and valence of 2, 3, or 4. It is a steel-white metal which does not tarnish in air. Palladium has the lowest melting point and density of the platinum metals. Annealed palladium is soft and ductile, but it becomes much stronger and harder through coldworking. Palladium is attacked by nitric acid and sulfuric acid. At room temperature, the metal can absorb up to 900 times its own volume of hydrogen. Palladium can be beaten into leaf as thin as 1/250,000 of an inch.
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Uses of Palladium |
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Hydrogen readily diffuses through heated palladium, so this method is often used to purify the gas. Finely divided palladium is used as a catalyst for hydrogenation and dehydrogenation reactions. Palladium is used as an alloying agent and for making jewelry and in dentistry. White gold is an alloy of gold which has been decolorized by the addition of palladium. The metal is also usd to make surgical instruments, electrical contacts, and watches.
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Hystory of Palladium |
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- Discoverer: William Wollaston
- Discovery Location: England
- Discovery Year: 1803
- Name Origin: Palladium was named for the asteroid Pallas. It was discovered approximately the same time. Also Pallas was the Greek goddess of wisdom.
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