Silver
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| Chemical formula | Ag |
|---|---|
| Atomic Number | 47 |
| OTP appearance | silver solid |
| Molar Mass(g/mol) | 107.9 |
| Density(g/cc) | 10.49 |
| Melting Point(°C) | 961.8 |
| Boiling Point(°C) | 2162 |
| Coefficient of Thermal Expansion(×10-6 °C-1) | 19.7 |
| NFPA 704 |  0
1
0
|
Silver is one of the seven metals of antiquity. Along with gold and platinum it is considered one of the noble metals.
Uses
Justification Questioned
Other
- as an excellent conductor
- as a catalyst for the decomposition of hydrogen peroxide
- in an amalgam composed of 40-70% silver, 0-30% tin, 2-40% copper and 0-2% zinc mixed with an equal mass of mercury, is used for dental fillings
- -oxide and -peroxide are used for high charge density voltaic cells
Natural Occurrence
- Elemental silver does occur naturally
- Elemental silver occurs as an impurity in gold
- Silver occurs as a substitution impurity in lead ores such as galena
- Silver occurs as a substitution impurity in copper ores such as chalcopyrite
Hazards
Production
Extraction
From silver compounds
Simple heating. (2 Ag2O → 2 Ag + O2 @ 280°C)
From lead bodies
- See Parkes process and Cupellation.