47
Ag
11
周期
5
ブロック
d
陽子
電子
中性子
47
47
61
一般特性
原子番号
47
原子量
107.8682
質量数
108
カテゴリ
遷移元素
銀色
放射性
いいえ
The Latin word for silver is argentum
結晶構造
面心立方格子
歴史
Silver has been used for thousands of years for ornaments and utensils, for trade, and as the basis for many monetary systems.

Its value as a precious metal was long considered second only to gold.

Slag dumps in Asia Minor and on islands in the Aegean Sea indicate that man learned to separate silver from lead as early as 3000 BC.
電子殻
2, 8, 18, 18, 1
電子配置
[Kr] 4d10 5s1
Ag
In ancient Egypt and Medieval Europe, silver was often more valuable than gold
物理特性
固体
密度
10.49 g/㎝3
融点
1234.93 K | 961.78 °C | 1763.2 °F
沸点
2435.15 K | 2162 °C | 3923.6 °F
融解熱
11.3 kJ/mol
蒸発熱
255 kJ/mol
熱容量
0.235 J/g·K
地殻中における存在比
7.9×10-6%
宇宙空間における存在比
6×10-8%
A
画像の出典: Wikimedia Commons (Alchemist-hp)
A pure silver crystal, synthetic electrolytic made with visible dendritic structures
CAS登録番号
7440-22-4
PubChem CID Number
23954
原子特性
原子半径
144 pm
共有結合半径
145 pm
電気陰性度
1.93 (ポーリングの値)
イオン化エネルギー
7.5762 eV
モル体積
10.3 ㎝3/mol
熱伝導率
4.29 W/㎝·K
酸化数
1, 2, 3
用途
Silver has long been valued as a precious metal, and is used as an investment, to make ornaments, jewelry, high-value tableware, utensils, and currency coins.

It is also used in electrical contacts and conductors, in mirrors and in catalysis of chemical reactions.

Its compounds are used in photographic film, and dilute silver nitrate solutions and other silver compounds are used as disinfectants and microbiocides
Silver is considered to be non-toxic
同位体
安定同位体
107Ag, 109Ag
不安定同位体
93Ag, 94Ag, 95Ag, 96Ag, 97Ag, 98Ag, 99Ag, 100Ag, 101Ag, 102Ag, 103Ag, 104Ag, 105Ag, 106Ag, 108Ag, 110Ag, 111Ag, 112Ag, 113Ag, 114Ag, 115Ag, 116Ag, 117Ag, 118Ag, 119Ag, 120Ag, 121Ag, 122Ag, 123Ag, 124Ag, 125Ag, 126Ag, 127Ag, 128Ag, 129Ag, 130Ag