Rodium

45
Rh
Golongan
9
Periode
5
Blok
d
Proton
Elektron
Neutron
45
45
58
Sifat Umum
Nomor atom
45
Massa atom
102,9055
Nomor massa
103
Kategori
Logam transisi
Warna
Perak
Radioaktif
Tidak
From the Greek word rhodon, rose
Struktur kristal
Kubik Berpusat-muka
Sejarah
Rhodium was discovered in 1803 by William Hyde Wollaston in London.

He used crude platinum ore presumably obtained from South America.

The introduction of the three way catalytic converter by Volvo in 1976 increased the demand for rhodium.
Elektron per kulit
2, 8, 18, 16, 1
Konfigurasi elektron
[Kr] 4d8 5s1
Rh
Rhodium metal does not normally form an oxide, even when heated
Sifat Fisika
Fase
Solid
Kepadatan
12,41 g/cm3
Titik lebur
2237,15 K | 1964 °C | 3567,2 °F
Titik didih
3968,15 K | 3695 °C | 6683 °F
Kalor peleburan
21,7 kJ/mol
Kalor penguapan
495 kJ/mol
Kapasitas kalor molar
0,243 J/g·K
Kelimpahan di kerak bumi
7×10-8%
Kelimpahan di alam semesta
6×10-8%
Rhodium
Kredit Gambar: Wikimedia Commons (Alchemist-hp)
Rhodium powder
Nomor CAS
7440-16-6
PubChem CID Number
23948
Sifat Atom
Jari-jari atom
134 pm
Jari-jari kovalen
142 pm
Elektronegativitas
2,28 (Skala Pauling)
Potensi Ionisasi
7,4589 eV
Volume atom
8,3 cm3/mol
Kondusivitas termal
1,5 W/cm·K
Bilangan oksidasi
-1, 1, 2, 3, 4, 5, 6
Aplikasi
The element's major use is as one of the catalysts in the three-way catalytic converters in automobiles.

Rhodium is used as an alloying agent for hardening and improving the corrosion resistance of platinum and palladium.

It is also used as a filter in mammography systems because of the characteristic X-rays it produces.

Rhodium is also used for jewelry and for decorations.
Rhodium is considered to be non-toxic
Isotop
Isotop stabil
103Rh
Isotop tidak stabil
89Rh, 90Rh, 91Rh, 92Rh, 93Rh, 94Rh, 95Rh, 96Rh, 97Rh, 98Rh, 99Rh, 100Rh, 101Rh, 102Rh, 104Rh, 105Rh, 106Rh, 107Rh, 108Rh, 109Rh, 110Rh, 111Rh, 112Rh, 113Rh, 114Rh, 115Rh, 116Rh, 117Rh, 118Rh, 119Rh, 120Rh, 121Rh, 122Rh