48
Cd
12
週期
5
d
個質子
電子
個中子
48
48
64
一般屬性
原子序數
48
標準原子質量
112.411
品質編號
112
類別
過渡金屬
顏色
銀色
放射性
From the Latin word cadmia, Greek kadmeia - the ancient name for calamine, zinc carbonate
晶體結構
簡單六角形
歷史
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.
每個外殼的電子
2, 8, 18, 18, 2
電子排布
[Kr] 4d10 5s2
Cd
Cadmium is a soft metal which is easily cut with a knife
物理性質
物態
固體
密度
8.69 g/cm3
熔點
594.22 K | 321.07 °C | 609.93 °F
沸點
1040.15 K | 767 °C | 1412.6 °F
熔化熱
6.3 kJ/mol
汽化熱
100 kJ/mol
比熱容
0.232 J/g·K
地殼豐度
0.000015%
宇宙豐度
2×10-7%
A
圖片來源: Wikimedia Commons (Alchemist-hp)
A crystal cadmium bar made by the flux process
CAS 編號
7440-43-9
Pubchem CID 編號
23973
原子性質
原子半徑
151 pm
共價半徑
144 pm
電負性
1.69 (鲍林标度)
電離電位
8.9938 eV
原子體積
13.1 cm3/mol
熱導率
0.968 W/cm·K
氧化態
1, 2
應用
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.
Cadmium and its compounds are highly toxic
同位素
穩定同位素
106Cd, 108Cd, 110Cd, 111Cd, 112Cd, 114Cd
不穩定同位素
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