Silver (Ag)

From Wikipedia, the free encyclopediaSilver is a chemical element with symbol Ag (Greek:άργυρος árguros, Latin:argentum, both from the Indo-European root *h₂erǵ- for "grey" or "shining") and atomic number 47. A soft, white, lustrous transition metal, it possesses the highest electrical conductivity, thermal conductivity and reflectivity of any metal. The metal occurs naturally in its pure, free form (native silver), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite.

Silver in the periodic table

SymbolAg
Atomic number47
Group11
Period5
Blockd
Element categoryTransition Metal

Physical properties

Phase at STPSolid
Density10.49 g/cm3
Atomic weight107.868 u
Melting point1234.93 K
961.78 °C
1763.204 °F
Boiling point2435 K
2161.85 °C
3923.33 °F

Atomära egenskaper

Electronegativity (Pauling Scale)1.93
Electron affinity125.862 kJ/mol
Ionization energies
1731 kJ/mol
2 2070 kJ/mol
3 3361 kJ/mol

Electron configuration

Electron configuration1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s1
Electrons per shell2, 8, 18, 18, 1

History

Discovered-5000
Discovered byAsia Minor