47
Ag
Silver
107.8682
Silver (Ag)
Transition MetalGroup 11Period 5d-block-block
Silver 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.
Latin name: Argentum
Atomic Number
47
Atomic Mass
107.8682 g/mol
Phase (STP)
Solid
Electron Config.
[Kr] 4d¹⁰ 5s¹
General
SymbolAg
Atomic Number47
Atomic Mass107.8682 g/mol
CategoryTransition Metal
Group11
Period5
Blockd-block
Electron Configuration[Kr] 4d¹⁰ 5s¹
Valence Electrons11
Colourlustrous metallic white
Appearancelustrous white metal
CAS NumberCAS7440-22-4
Physical Properties
Phase (STP)Solid
Density10.49 g/cm³
Melting Point961.78°C · 1763.20°F · 1234.93 K
Boiling Point2161.85°C · 3923.33°F · 2435.00 K
Atomic Properties
Atomic Radius165 pm
Electronegativity1.93 Pauling
Ionization Energy731 kJ/mol
Oxidation States+1, +2, +3
Ion ChargeAg+/Ag2+
Thermodynamic
Molar Heat25.35 J/(mol·K)
Crystal Structure
Crystal Structureface-centered cubic
Mechanical Properties
Mohs Hardness2.5
Abundance
In Universe0.00005%
In Sun0.00003%
In Earth's Crust0.00007500000000000001%
In Oceans0.0000001%
In Meteorites0.00002%
Discovery & History
Discovered Byunknown
Isotopes of Silver
| Isotope | Abundance | Half-life | Decay |
|---|---|---|---|
| Ag-107 | 51.839% | Stable | — |
| Ag-109 | 48.161% | Stable | — |