79
Au
11
周期
6
ブロック
d
陽子
電子
中性子
79
79
118
一般特性
原子番号
79
原子量
196.966569
質量数
197
カテゴリ
遷移元素
金色
放射性
いいえ
From the Latin word aurum meaning gold
結晶構造
面心立方格子
歴史
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.
電子殻
2, 8, 18, 32, 18, 1
電子配置
[Xe] 4f14 5d10 6s1
Au
India is the world's largest single consumer of gold
物理特性
固体
密度
19.282 g/㎝3
融点
1337.35 K | 1064.2 °C | 1947.56 °F
沸点
3129.15 K | 2856 °C | 5172.8 °F
融解熱
12.5 kJ/mol
蒸発熱
330 kJ/mol
熱容量
0.129 J/g·K
地殻中における存在比
3.1×10-7%
宇宙空間における存在比
6×10-8%
Synthetic
画像の出典: Wikimedia Commons (Alchemist-hp)
Synthetic made gold crystals by the chemical transport reaction in chlorine gas
CAS登録番号
7440-57-5
PubChem CID Number
23985
原子特性
原子半径
144 pm
共有結合半径
136 pm
電気陰性度
2.54 (ポーリングの値)
イオン化エネルギー
9.2255 eV
モル体積
10.2 ㎝3/mol
熱伝導率
3.17 W/㎝·K
酸化数
-1, 1, 2, 3, 5
用途
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
同位体
安定同位体
197Au
不安定同位体
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