Aurum

79
Au
Kumpulan
11
Kala
6
Blok
d
Proton
Elektron
Neutron
79
79
118
Ciri-Ciri Am
Nombor atom
79
Berat atom
196.966569
Nombor jisim
197
Kategori
Logam peralihan
Warna
Emas
Radioaktif
Tidak
From the Latin word aurum meaning gold
Struktur hablur
Pusat Wajah Kubik
Sejarah
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.
Bilangan elektron per petala
2, 8, 18, 32, 18, 1
Konfigurasi elektron
[Xe] 4f14 5d10 6s1
Au
India is the world's largest single consumer of gold
Ciri-Ciri Fizikal
Fasa
Pepejal
Ketumpatan
19.282 g/cm3
Takat lebur
1337.35 K | 1064.2 °C | 1947.56 °F
Takat didih
3129.15 K | 2856 °C | 5172.8 °F
Haba pelakuran
12.5 kJ/mol
Haba pengewapan
330 kJ/mol
Muatan haba molar
0.129 J/g·K
Banyak pada kerak bumi
3.1×10-7%
Banyak pada alam semesta
6×10-8%
Synthetic
Kredit imej: Wikimedia Commons (Alchemist-hp)
Synthetic made gold crystals by the chemical transport reaction in chlorine gas
Nombor CAS
7440-57-5
PubChem CID Number
23985
Ciri-Ciri Atom
Jejari atom
144 pm
Jejari kovalen
136 pm
Keelektronegatifan
2.54 (Skala Pauling)
Kebolehan mengion
9.2255 eV
Isipadu atom
10.2 cm3/mol
Daya pengaliran terma
3.17 W/cm·K
Keadaan pengoksidaan
-1, 1, 2, 3, 5
Aplikasi
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
Isotop
Isotop stabil
197Au
Isotop tidak stabil
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