Praseodymium (Pr)

General Properties

Symbol Pr
Atomic Number 59
Atomic Weight 140.90765
Group
(Lanthanoids)
Solid, Conductor, Lanthanide, Stable, Natural
Period 6
Block f

Physical Properties

Density 6.77 g/cm3
Atomic Volume 20.8 cm3/mole
Atomic Radius 1.82 angstroms
Covalent Radius --
Crust Abundance 0.00086%
Crystal Structure Hexagonal
Color Silver

Energy

Electronegativity 1.1 (Pauling Scale)
Electron Affinity 50 kJ/mol
1st Ionization Energy 527 kJ/mol
2nd Ionization Energy 1020 kJ/mol
3rd Ionization Energy 2086 kJ/mol
4th Ionization Energy 3761 kJ/mol
5th Ionization Energy 5551 kJ/mol
Specific Heat Capacity 0.193 J g−1 K−1
Thermal Conductivity 12.5 W·m−1·K−1

Electrons & Oxidation

Oxidation States +3,4
Electrons Per Shell 2 8 18 21 8 2
Electron Configuration [Xe] 4f3 6s2
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f3 6s2
Orbital Diagram
1s
↿⇂
2s
↿⇂
2p
↿⇂
↿⇂
↿⇂
3s
↿⇂
3p
↿⇂
↿⇂
↿⇂
3d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4s
↿⇂
4p
↿⇂
↿⇂
↿⇂
4d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4f
↿ 
↿ 
↿ 
 
 
 
 
5s
↿⇂
5p
↿⇂
↿⇂
↿⇂
5d
 
 
 
 
 
5f
 
 
 
 
 
 
 
6s
↿⇂
6p
 
 
 
6d
 
 
 
 
 
6f
 
 
 
 
 
 
 

Nuclear

Radioactive No

Media

Planetary Bohr Model of Praseodymium (Pr)
Lewis Dot Diagram of Praseodymium (Pr)
Description
Silvery white, moderately soft, malleable, ductile metal.
Uses
Used with neodymium to make lenses for glass maker's goggles since it filters out the yellow light present in glass blowing. Alloyed with magnesium creates a high-strength metal used in aircraft engines. Makes up 5% of Mich metal.
Sources
Obtained from same salts as neodymium.
Pronounciation (English)
pra-si-eh-DIM-i-em

Translations

Afrikaans Praseodimium
Aragonese Praseodimio
العربية براسوديميوم
Armãneashte Prazeoodimiumu
asturianu Praseodimiu
azərbaycan dili Prazeodim
български Празеодим
বাংলা প্র্যাসেওডিমিয়াম
brezhoneg Prazeodim
bosanski Praseodymijum, ²Praseodimij
Byelorussian Празеадым
Cebuano Praseodimyo
čeština Praseodym
Chuvash Празеодим
Cymraeg Praseodimi
dansk Praseodymium
Deutsch Praseodym
Ελληνικά Πρασεοδυμιο
English Praseodymium
esperanto Prazeodimo
español Prosedímio
eesti Praseodüüm
euskara Praseodimioa
فارسی پرازئودیمیم
suomi Praseodyymi
føroyskt Praseodymium
français Praséodyme
furlan Praseodimi
West-Frysk Praseodymium
Gaeilge Praiséidimiam
Gàidhlig Praiseoidimiam
galego Praseodimio
ગુજરાતી પ્રેસિઓડિનિયમનો
Gaelg Prashodymmium
Hakka Chinese Phú (鐠)
עברית פרסיאודימיום
हिन्दी प्रासियोडाइमियम
hrvatski Praseodimij
magyar Prazeodímium
հայերեն Պրազեդիում
Indonesia Praseodinium
íslenska Praseódým
italiano Praseodimio
日本語 プラセオジム
ქართული პრაზეოდიმი
کٲشُر Prazeòdim
қазақ тілі Празеодий
한국어 프라세오디뮴
Kurdish Praseodmyûm
Komi Празеодим
kernewek Prasodyum
кыргызча Празеодий
Latin Praseodymium
Lëtzebuergesch Praseodym
Lombard Praseudími
lingála Padimu
lietuvių Prazeodimis
latviešu Praseodīms
Mari Празеодим
Maori Praseodymium
македонски Празеодимиум
മലയാളം പ്രസിയോഡൈമിയം
монгол Празеодим
Мокшан Праседими
Bahasa Melayu Praseodimium
Malti Praseodimju[m]
Nahuatl Praseodimio
Nederlands Praseodymium
norsk Praseodym
Occitan Praseodimi
ирон Празеодий
polski Prazeodym
português Praseodímio
Runasimi Praseodimyu
română Praseodim
русский Празеодим
slovenčina Prazeodým
slovenščina Prazeodim
Samoan Praseodimimi
Samogitian Prazeoduomis
shqip Prazeodim, ²Praseodymi
српски Празеодијум
Southern Sotho Praseodymiamo
svenska Praseodym
Kiswahili Praseodimi
தமிழ் --
Tajik Празеодим
ไทย เพรซิโอดิเมียม
Türkçe Praseodim
ئۇيغۇرچە پرازېئودىمىي
українська Празеодим
o‘zbek Prazeodim
Tiếng Việt Prazeođim
Võro Praseodüüm
中文

History

Discovered In
1885
Discovered By
Carl F. Auer von Welsbach
Discovered At
Austria
Word Origin
From the Greek words "prasios didymos" meaning "green twin"