Paladium
46
Pd
Golongan
10
Periode
5
Blok
d
Proton
Elektron
Neutron
46
46
60
Sifat Umum
Nomor atom
46
Massa atom
106,42
Nomor massa
106
Kategori
Logam transisi
Warna
Perak
Radioaktif
Tidak
Palladium was named after the asteroid Pallas; Pallas was the Greek goddess of wisdom
Struktur kristal
Kubik Berpusat-muka
Sejarah
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.
Elektron per kulit
2, 8, 18, 18
Konfigurasi elektron
[Kr] 4d10
In the late 1800s, palladium was more expensive than platinum
Sifat Fisika
Fase
Solid
Kepadatan
12,02 g/cm3
Titik lebur
1828,05 K | 1554,9 °C | 2830,82 °F
Titik didih
3236,15 K | 2963 °C | 5365,4 °F
Kalor peleburan
16,7 kJ/mol
Kalor penguapan
380 kJ/mol
Kapasitas kalor molar
0,244 J/g·K
Kelimpahan di kerak bumi
6,3×10-7%
Kelimpahan di alam semesta
2×10-7%
Nomor CAS
7440-05-3
Nomor PubChem CID
23938
Sifat Atom
Jari-jari atom
137 pm
Jari-jari kovalen
139 pm
Elektronegativitas
2,2 (Skala Pauling)
Potensi Ionisasi
8,3369 eV
Volume atom
8,9 cm3/mol
Kondusivitas termal
0,718 W/cm·K
Bilangan oksidasi
2, 4
Aplikasi
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
Isotop
Isotop stabil
102Pd, 104Pd, 105Pd, 106Pd, 108Pd, 110PdIsotop tidak stabil
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