Emas

79
Au
Golongan
11
Periode
6
Blok
d
Proton
Elektron
Neutron
79
79
118
Sifat Umum
Nomor atom
79
Massa atom
196,966569
Nomor massa
197
Kategori
Logam transisi
Warna
Emas
Radioaktif
Tidak
From the Latin word aurum meaning gold
Struktur kristal
Kubik Berpusat-muka
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.
Elektron per kulit
2, 8, 18, 32, 18, 1
Konfigurasi elektron
[Xe] 4f14 5d10 6s1
Au
India is the world's largest single consumer of gold
Sifat Fisika
Fase
Solid
Kepadatan
19,282 g/cm3
Titik lebur
1337,35 K | 1064,2 °C | 1947,56 °F
Titik didih
3129,15 K | 2856 °C | 5172,8 °F
Kalor peleburan
12,5 kJ/mol
Kalor penguapan
330 kJ/mol
Kapasitas kalor molar
0,129 J/g·K
Kelimpahan di kerak bumi
3,1×10-7%
Kelimpahan di alam semesta
6×10-8%
Synthetic
Kredit Gambar: Wikimedia Commons (Alchemist-hp)
Synthetic made gold crystals by the chemical transport reaction in chlorine gas
Nomor CAS
7440-57-5
PubChem CID Number
23985
Sifat Atom
Jari-jari atom
144 pm
Jari-jari kovalen
136 pm
Elektronegativitas
2,54 (Skala Pauling)
Potensi Ionisasi
9,2255 eV
Volume atom
10,2 cm3/mol
Kondusivitas termal
3,17 W/cm·K
Bilangan oksidasi
-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