Palladium
46
Pd
Groep
10
Periode
5
Blok
d
Protrone
Elektrone
Neutrone
46
46
60
Algemene Eienskappe
Atoom Nommer
46
Atoommassa
106,42
Massa Nommer
106
Kategorie
Oorgangsmetale
Kleur
Silver
Radioaktief
Nee
Palladium was named after the asteroid Pallas; Pallas was the Greek goddess of wisdom
Kristalstruktuur
Gesiggesentreerde kubieke
Geskiendenis
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.
Elektrone per skil
2, 8, 18, 18
Elektronkonfigurasie
[Kr] 4d10
In the late 1800s, palladium was more expensive than platinum
Fisiese Eienskappe
Fase
Soliede
Digtheid
12,02 g/cm3
Smeltpunt
1828,05 K | 1554,9 °C | 2830,82 °F
Kookpunt
3236,15 K | 2963 °C | 5365,4 °F
Heat of Fusion
16,7 kJ/mol
Heat of Vaporization
380 kJ/mol
Spesifieke Hitte Kapasiteit
0,244 J/g·K
Oorvloed in die aardkors
6,3×10-7%
Oorvloed in die heelal
2×10-7%
CAS Nommer
7440-05-3
PubChem CID Nommer
23938
Atomiese Eienskappe
Atoom radius
137 pm
Kovalente Radius
139 pm
Elektronegatiewiteit
2,2 (Pauling scale)
Ionisasie potensiaal
8,3369 eV
Atoom volume
8,9 cm3/mol
Termiese geleidingsvermoë
0,718 W/cm·K
Oksidasiestate
2, 4
Toepassings
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
Isotope
Stabiele Isotope
102Pd, 104Pd, 105Pd, 106Pd, 108Pd, 110PdOnstabiele Isotope
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