Guld

79
Au
Gruppe
11
Periode
6
Blok
d
Protons
Electrons
Neutrons
79
79
118
General Properties
Atomnummer
79
Atommasse
196,966569
Mass Number
197
Kategori
Overgangsmetaller
Farve
Gold
Radioactive
Nej
From the Latin word aurum meaning gold
Krystalstruktur
Fladecentreret Kubisk
History
Gold has been known since prehistoric times and was the first metal used by humans.

Gold artifacts dated to 5000 years ago have been found in Egyptian tombs.

Gold of 98% purity has been found in Nahal Qunah in the ancient kingdom of Israel, dating from about 6000 years ago.
Elektroner i hver skal
2, 8, 18, 32, 18, 1
Elektronkonfiguration
[Xe] 4f14 5d10 6s1
Au
India is the world's largest single consumer of gold
Physical Properties
Tilstandsform
Fast stof
Massefylde
19,282 g/cm3
Smeltepunkt
1337,35 K | 1064,2 °C | 1947,56 °F
Kogepunkt
3129,15 K | 2856 °C | 5172,8 °F
Smeltevarme
12,5 kJ/mol
Fordampningsvarme
330 kJ/mol
Varmefylde
0,129 J/g·K
Abundance in Earth's crust
3,1×10-7%
Abundance in Universe
6×10-8%
Synthetic
Billede akkrediteringer: Wikimedia Commons (Alchemist-hp)
Synthetic made gold crystals by the chemical transport reaction in chlorine gas
CAS Number
7440-57-5
PubChem CID Number
23985
Atomic Properties
Atomradius
144 pm
Kovalent radius
136 pm
Elektronegativitet
2,54 (Paulings skala)
Ionization Potential
9,2255 eV
Atomic Volume
10,2 cm3/mol
Varmeledningsevne
3,17 W/cm·K
Oxidationstrin
-1, 1, 2, 3, 5
Applications
Gold is used in coinage and is a standard for monetary systems in many countries.

It is also extensively used for jewelry, decoration, dental work, and for plating.

Gold is used widely in microelectronic circuits to ensure reliable, corrosion-resistant and static-free performance.

Gold leaf, flake or dust is used in some gourmet foods as decorative ingredient.
Gold is considered to be non-toxic
Isotoper
Stable Isotopes
197Au
Unstable Isotopes
169Au, 170Au, 171Au, 172Au, 173Au, 174Au, 175Au, 176Au, 177Au, 178Au, 179Au, 180Au, 181Au, 182Au, 183Au, 184Au, 185Au, 186Au, 187Au, 188Au, 189Au, 190Au, 191Au, 192Au, 193Au, 194Au, 195Au, 196Au, 198Au, 199Au, 200Au, 201Au, 202Au, 203Au, 204Au, 205Au