Rhodium (Rh)

General Properties

Symbol Rh
Atomic Number 45
Atomic Weight 102.9055
Group
9 (cobalt family)
VIIIA (IUPAC), VIII (CAS)
Solid, Paramagnetic, Conductor, Transition Metal, Metal, Stable, Natural
Period 5
Block d

Physical Properties

Density 12.4 g/cm3
Atomic Volume 8.3 cm3/mole
Atomic Radius 1.34 angstroms
Covalent Radius 135 pm
Crust Abundance 7E-8%
Crystal Structure Cubic: Face centered
Color Silver

Energy

Electronegativity 2.3 (Pauling Scale)
Electron Affinity 109.7 kJ/mol
1st Ionization Energy 720 kJ/mol
2nd Ionization Energy 1740 kJ/mol
3rd Ionization Energy 2997 kJ/mol
Specific Heat Capacity 0.242 J g−1 K−1
Thermal Conductivity 150.0 W·m−1·K−1

Electrons & Oxidation

Oxidation States +3,4,6
Electrons Per Shell 2 8 18 16 1
Electron Configuration [Kr] 4d8 5s1
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d8 5s1
Orbital Diagram
1s
↿⇂
2s
↿⇂
2p
↿⇂
↿⇂
↿⇂
3s
↿⇂
3p
↿⇂
↿⇂
↿⇂
3d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4s
↿⇂
4p
↿⇂
↿⇂
↿⇂
4d
↿⇂
↿⇂
↿⇂
↿ 
↿ 
4f
 
 
 
 
 
 
 
5s
↿ 
5p
 
 
 
5d
 
 
 
 
 
5f
 
 
 
 
 
 
 

Nuclear

Radioactive No

Media

Planetary Bohr Model of Rhodium (Rh)
Description
Hard, silvery-white metal
Uses
Used as a coating to prevent wear on high quality science equipment and with platinum to make thermocouples.
Sources
Obtained as a by-product of nickel production.
Pronounciation (English)
RO-di-em

Translations

Afrikaans Rhodium
Aragonese Rodio
العربية روديوم
Armãneashte Rodiumu
asturianu Rodiu
azərbaycan dili Rodium
български Родий
বাংলা রোডিয়াম
brezhoneg Rodiom
bosanski Rodij[um]
Byelorussian Родый
Cebuano Rodyo
čeština Rhodium
Chuvash Роди
Cymraeg Rodi
dansk Rhodium
Deutsch Rhodium
Ελληνικά Ροδιο
English Rhodium
esperanto Rodio
español Rodio
eesti Roodium
euskara Rodioa
فارسی رودیم
suomi Rodium
føroyskt Rodium
français Rhodium
furlan Rodi
West-Frysk Rhodium
Gaeilge Róidiam
Gàidhlig Ròidiam
galego Rodio
ગુજરાતી રોડિયમનો
Gaelg Roydjum
Hakka Chinese Ló (銠)
עברית רודיום
हिन्दी रोडियम
hrvatski Rodij
magyar Ródium
հայերեն Ռոդիում
Indonesia Rodium
íslenska Ródín
italiano Rodio
日本語 ロジウム
ქართული როდიუმი
کٲشُر Ród
қазақ тілі Родий
한국어 로듐
Kurdish Rodyûm
Komi Родий
kernewek Rhodyum
кыргызча Родий
Latin Rhodium
Lëtzebuergesch Rhodium
Lombard Ròdi
lingála Lodu
lietuvių Rodis
latviešu Rodijs
Mari Родий
Maori Rhodium
македонски Родиум
മലയാളം റോഡിയം
монгол Роди
Мокшан Роди
Bahasa Melayu Rodium
Malti Rodju[m]
Nahuatl Rodio
Nederlands Rhodium
norsk Rhodium
Occitan Ròdi
ирон Родий
polski Rod
português Ródio
Runasimi Rodyu
română Rodiu
русский Родий
slovenčina Ródium
slovenščina Rodij
Samoan Rodimi
Samogitian Ruodis
shqip Rodium, ²Rhodiumi
српски Родијум
Southern Sotho Rhodiamo
svenska Rodium
Kiswahili Rodi
தமிழ் ரோடியம்
Tajik Родий
ไทย โรเดียม
Türkçe Rodyum
ئۇيغۇرچە رودىي
українська Родій
o‘zbek Rodiy
Tiếng Việt Rođi
Võro Roodium
中文

History

Discovered In
1803
Discovered By
William Hyde Wollaston
Discovered At
England
Word Origin
From the Greek word "rhodon" meaning "rose"