SiLver

 

 

 

Basic Facts                                                                  

·        Silver’s date of discovery and discoverer are unknown, but this element has been in use since ancient times

·        The name silver comes from the Old English word Seolfur

·        The symbol for silver, Ag, comes from the Latin word argentum

·        Silver is found in ores including argentite, lead, lead-zinc, copper, and gold, found in Mexico, Peru, and the USA

·        Pure silver has the highest electrical and thermal conductivity of all metals, and possesses the lowest contact resistance

·        Silver is a little harder than gold and is very ductile and malleable

·        Silver is used in the black part of negatives in filmmaking

·        Silver is frequently used to make jewelry

·        Like all transition metals in columns IB and IIB, silver is a great conductor of electricity

·        When exposed to compounds such as Sulfur dioxide, silver tarnishes

·        Silver is somewhat rare and expensive, but is not as expensive as gold

·        Silver is used in solder and dental alloys

·        Silver is used for electrical connections and high capacity batteries

·        Silver is the best reflector of visible light and is used in mirror backings

 

                                            Properties

Physical Properties

Chemical Properties

Appearance: Soft, silver metal

Valence Number: +1

Density @ 293 K: 10.5cm3

Electron Configuration: 2,8,18,18,1

Melting Point: 1233.8 K

Electronegativity: 1.93

Boiling Point: 2483 K

1st Ionization Potential: 7.6 Volts

Specific Heat: .235 J/g-1/K-1

2nd Ionization Potential: 21.5 Volts

Heat of Vaporization: 250 kJ/mole-1

3rd Ionization Potential: 34.8 Volts

Heat of Fusion: 11.3 kJ/mole-1

Max Ionization Number: 3

Electrical Conductivity: .630106 cm-1/Ohm-1

Min Ionization Number: 0

Thermal Conductivity: 4.29 W/cm-1/K-1

Number of Isotopes: 2

Atomic Radius: 144 pm

Hydrides: none

Hardness: 3.25 mohs

Oxides: Ag2O

State: Solid @ 298 K

Chlorides: AgCl

Ionic Radius: 128 pm(+1 ion), 108 pm (+2 ion), 89 pm(+3 ion)

 

 

 

 

                            

 

                           Did you Know?

                **Man learned to separate silver from lead as early as 3000 BC?                                     **Silver iodide, AgI, is (or was?) used for causing clouds to produce rain?