鈀
46
Pd
族
10
週期
5
區
d
個質子
電子
個中子
46
46
60
一般屬性
原子序數
46
標準原子質量
106.42
品質編號
106
類別
過渡金屬
顏色
銀色
放射性
否
因小行星帕拉斯（希臘神話中的智慧之神）而得名
晶體結構
面居中立方
歷史
Palladium was discovered in 1803, in London, by English chemist William Hyde Wollaston.
He examined the residues left from platinum after dissolving it in aqua regia, a concentrated solution of hydrochloric and nitric acids.
He then isolated palladium in a series of chemical reactions.
He examined the residues left from platinum after dissolving it in aqua regia, a concentrated solution of hydrochloric and nitric acids.
He then isolated palladium in a series of chemical reactions.
每個外殼的電子
2, 8, 18, 18
電子排布
[Kr] 4d10
In the late 1800s, palladium was more expensive than platinum
物理性質
物態
固體
密度
12.02 g/cm3
熔點
1828.05 K | 1554.9 °C | 2830.82 °F
沸點
3236.15 K | 2963 °C | 5365.4 °F
熔化熱
16.7 kJ/mol
汽化熱
380 kJ/mol
比熱容
0.244 J/g·K
地殼豐度
6.3×10-7%
宇宙豐度
2×10-7%
CAS 編號
7440-05-3
Pubchem CID 編號
23938
原子性質
原子半徑
137 pm
共價半徑
139 pm
電負性
2.2 (鲍林标度)
電離電位
8.3369 eV
原子體積
8.9 cm3/mol
熱導率
0.718 W/cm·K
氧化態
2, 4
應用
The largest use of palladium is in catalytic converters in the automobile industry.
Finely divided palladium is a good catalyst and is used for hydrogenation and dehydrogenation reactions.
The metal is used in dentistry, watch making, and in making surgical instruments and electrical contacts.
Finely divided palladium is a good catalyst and is used for hydrogenation and dehydrogenation reactions.
The metal is used in dentistry, watch making, and in making surgical instruments and electrical contacts.
Palladium is considered to be of low toxicity
同位素
穩定同位素
102Pd, 104Pd, 105Pd, 106Pd, 108Pd, 110Pd不穩定同位素
91Pd, 92Pd, 93Pd, 94Pd, 95Pd, 96Pd, 97Pd, 98Pd, 99Pd, 100Pd, 101Pd, 103Pd, 107Pd, 109Pd, 111Pd, 112Pd, 113Pd, 114Pd, 115Pd, 116Pd, 117Pd, 118Pd, 119Pd, 120Pd, 121Pd, 122Pd, 123Pd, 124Pd