カドミウム
48
Cd
族
12
周期
5
ブロック
d
陽子
電子
中性子
48
48
64
一般特性
原子番号
48
原子量
112.411
質量数
112
カテゴリ
遷移元素
色
銀色
放射性
いいえ
From the Latin word cadmia, Greek kadmeia - the ancient name for calamine, zinc carbonate
結晶構造
六方最密構造
歴史
Cadmium was discovered by German chemist Friedrich Stromeyer in 1817 as an impurity in zinc carbonate.
Stromeyer noted that some impure samples of calamine (zinc carbonate) changed color when heated but pure calamine did not.
Cadmium was independently discovered by German chemist Karl Hermann in 1818.
Stromeyer noted that some impure samples of calamine (zinc carbonate) changed color when heated but pure calamine did not.
Cadmium was independently discovered by German chemist Karl Hermann in 1818.
電子殻
2, 8, 18, 18, 2
電子配置
[Kr] 4d10 5s2
Cadmium is a soft metal which is easily cut with a knife
物理特性
相
固体
密度
8.69 g/㎝3
融点
594.22 K | 321.07 °C | 609.93 °F
沸点
1040.15 K | 767 °C | 1412.6 °F
融解熱
6.3 kJ/mol
蒸発熱
100 kJ/mol
熱容量
0.232 J/g·K
地殻中における存在比
0.000015%
宇宙空間における存在比
2×10-7%
CAS登録番号
7440-43-9
PubChem CID番号
23973
原子特性
原子半径
151 pm
共有結合半径
144 pm
電気陰性度
1.69 (ポーリングの値)
イオン化エネルギー
8.9938 eV
モル体積
13.1 ㎝3/mol
熱伝導率
0.968 W/㎝·K
酸化数
1, 2
用途
Cadmium is a key component in battery production.
It is also is used in electroplating.
Cadmium oxide is used in black and white television phosphors and in the blue and green phosphors for color television picture tubes.
Cadmium is used as a barrier to control neutrons in nuclear fission.
It is also is used in electroplating.
Cadmium oxide is used in black and white television phosphors and in the blue and green phosphors for color television picture tubes.
Cadmium is used as a barrier to control neutrons in nuclear fission.
Cadmium and its compounds are highly toxic
同位体
安定同位体
106Cd, 108Cd, 110Cd, 111Cd, 112Cd, 114Cd不安定同位体
95Cd, 96Cd, 97Cd, 98Cd, 99Cd, 100Cd, 101Cd, 102Cd, 103Cd, 104Cd, 105Cd, 107Cd, 109Cd, 113Cd, 115Cd, 116Cd, 117Cd, 118Cd, 119Cd, 120Cd, 121Cd, 122Cd, 123Cd, 124Cd, 125Cd, 126Cd, 127Cd, 128Cd, 129Cd, 130Cd, 131Cd, 132Cd