46
Pd
10
週期
5
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
Palladium was named after the asteroid Pallas; Pallas was the Greek goddess of wisdom
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.
每個外殼的電子
2, 8, 18, 18
電子排布
[Kr] 4d10
Pd
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%
Palladium
圖片來源: Images-of-elements
Palladium crystal
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.
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