Silver: Difference between revisions
Jump to navigation
Jump to search
(Created page with "{{Compound|name=Silver|chemf=Ag|density=10.49|group=Transition Metals|num=47|stp_p=solid|stp_q=silver|mm=107.9|mp=961.8|bp=2162|cote=19.7|nfpa_h=1}} Silver is one of the seven...") |
|||
Line 24: | Line 24: | ||
==References== | ==References== | ||
<references/> | <references/> | ||
Revision as of 09:28, 26 June 2019
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 |
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.