Paladio
46
Pd
Grupo
10
Perio
5
Bloko
d
Protonoj
Elektronoj
Neŭtronoj
46
46
60
Ĝeneralaj Propraĵoj
Atoma Nombro
46
Atommaso
106,42
Amasa Nombro
106
Kategorio
Transirmetaloj
Koloro
Arĝento
Radioaktiva
Ne
Palladium was named after the asteroid Pallas; Pallas was the Greek goddess of wisdom
Kristala Strukturo
Vizaĝo Centrita Kubo
Historio
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.
Elektronoj per ŝelo
2, 8, 18, 18
Elektrona Agordo
[Kr] 4d10
In the late 1800s, palladium was more expensive than platinum
Fizikaj Propraĵoj
Fazo
Solido
Denso
12,02 g/cm3
Fandpunkto
1828,05 K | 1554,9 °C | 2830,82 °F
Bolpunkto
3236,15 K | 2963 °C | 5365,4 °F
Varmo de Fuzio
16,7 kJ/mol
Varmo de Vaporiĝo
380 kJ/mol
Specifa Varmo Kapacito
0,244 J/g·K
Krusta Abundo
6,3×10-7%
Universa Abundo
2×10-7%
CAS Nombro
7440-05-3
PubChem Kunmetita Identiga Nombro
23938
Atomaj Propraĵoj
Atoma Radiuso
137 pm
Kovalenta Radiuso
139 pm
Elektronegativeco
2,2 (Pauling-skalo)
Potencialo de jonigo
8,3369 eV
Atoma Volumo
8,9 cm3/mol
Termika Kondukto
0,718 W/cm·K
Oksidaj Ŝtatoj
2, 4
Aplikoj
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
Izotopoj
Stabilaj Izotopoj
102Pd, 104Pd, 105Pd, 106Pd, 108Pd, 110PdMalstabilaj Isotopoj
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