Guld

79
Au
Grupp
11
Period
6
Block
d
Protoner
Elektroner
Neutroner
79
79
118
Generella Egenskaper
Atomnummer
79
Atommassa
196,966569
Masstal
197
Kategori
Övergångsmetaller
Färg
Guld
Radioaktiv
Nej
From the Latin word aurum meaning gold
Kristallstruktur
Ytcentrerat kubiskt
Historia
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 per skal
2, 8, 18, 32, 18, 1
Elektronkonfiguration
[Xe] 4f14 5d10 6s1
Au
India is the world's largest single consumer of gold
Fysikaliska Egenskaper
Aggregationstillstånd
Fast
Densitet
19,282 g/cm3
Smältpunkt
1337,35 K | 1064,2 °C | 1947,56 °F
Kokpunkt
3129,15 K | 2856 °C | 5172,8 °F
Smältvärme
12,5 kJ/mol
Ångbildningsvärme
330 kJ/mol
Specifik värmekapacitet
0,129 J/g·K
Abundance in Earth's crust
3,1×10-7%
Abundance in Universe
6×10-8%
Synthetic
Bildkrediter: 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
Atomära Egenskaper
Atomradie
144 pm
Kovalent radie
136 pm
Elektronegativitet
2,54 (Paulingskalan)
Jonisationspotential
9,2255 eV
Molvolym
10,2 cm3/mol
Värmeledningsförmåga
3,17 W/cm·K
Oxidationstillstånd
-1, 1, 2, 3, 5
Användningsområden
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
Stabila isotoper
197Au
Instabila isotoper
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