Samarium (Sm)

General Properties

Symbol Sm
Atomic Number 62
Atomic Weight 150.36
Group
(Lanthanoids)
Solid, Paramagnetic, Conductor, Lanthanide, Stable, Natural
Period 6
Block f

Physical Properties

Density 7.52 g/cm3
Atomic Volume 19.9 cm3/mole
Atomic Radius 1.81 angstroms
Covalent Radius --
Crust Abundance 0.0006%
Crystal Structure Rhombohedral
Color Silver

Energy

Electronegativity 1.2 (Pauling Scale)
Electron Affinity 50 kJ/mol
1st Ionization Energy 545 kJ/mol
2nd Ionization Energy 1070 kJ/mol
3rd Ionization Energy 2260 kJ/mol
4th Ionization Energy 3990 kJ/mol
Specific Heat Capacity 0.197 J g−1 K−1
Thermal Conductivity 13.3 W·m−1·K−1

Electrons & Oxidation

Oxidation States +3,2
Electrons Per Shell 2 8 18 24 8 2
Electron Configuration [Xe] 4f6 6s2
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f6 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 Samarium (Sm)
Lewis Dot Diagram of Samarium (Sm)
Description
Silvery rare earth metal.
Uses
It is used in the electronics and ceramics industries. It is easily magnetized and very difficult to demagnetize. This suggests important future applications in solid-state and superconductor technologies.
Sources
Found with other rare earths in monazite sand. The sand is often 50% rare earths by weight and 2.8% samarium.
Pronounciation (English)
seh-MER-i-em

Translations

Afrikaans Samarium
Aragonese Samario
العربية ساماريوم
Armãneashte Samariumu
asturianu Samariu
azərbaycan dili Samarium
български Самарий
বাংলা সামারিয়াম
brezhoneg Samariom
bosanski Samarij[um]
Byelorussian Самарый
Cebuano Samaryo
čeština Samarium
Chuvash Самари
Cymraeg Samari
dansk Samarium
Deutsch Samarium
Ελληνικά Σαμαριο
English Samarium
esperanto Samario
español Samário
eesti Samaarium
euskara Samarioa
فارسی ساماریم
suomi Samarium
føroyskt Samarium
français Samarium
furlan Samari
West-Frysk Samarium
Gaeilge Samairiam
Gàidhlig Samairiam
galego Samario
ગુજરાતી સમૅરિયમનો
Gaelg Samaarium
Hakka Chinese Sân (釤)
עברית סמריום
हिन्दी सैमरियम
hrvatski Samarij
magyar Szamárium
հայերեն Սամարիում
Indonesia Samarium
íslenska Samarín
italiano Samario
日本語 サマリウム
ქართული სამარიუმი
کٲشُر Samar
қазақ тілі Самарий
한국어 사마륨
Kurdish Samaryûm
Komi Самарий
kernewek Samaryum
кыргызча Самарий
Latin Samarium
Lëtzebuergesch Samarium
Lombard Samàri
lingála Samalu
lietuvių Samaris
latviešu Samārijs
Mari Самарий
Maori Samarium
македонски Самариум
മലയാളം സമേറിയം
монгол Самари
Мокшан Самари
Bahasa Melayu Samarium
Malti Samarju[m]
Nahuatl Samario
Nederlands Samarium
norsk Samarium
Occitan Samari
ирон Самарий
polski Samar
português Samário
Runasimi Samaryu
română Samariu
русский Самарий
slovenčina Samarium
slovenščina Samarij
Samoan Samarimi
Samogitian Samaris
shqip Samarium
српски Самаријум
Southern Sotho Samariamo
svenska Samarium
Kiswahili Samari
தமிழ் சமேரியம்
Tajik Самарий
ไทย ซาแมเรียม
Türkçe Samaryum
ئۇيغۇرچە چالغا
українська Самарій
o‘zbek Samariy
Tiếng Việt Samari
Võro Samaarium
中文

History

Discovered In
1879
Discovered By
Paul Emile Lecoq de Boisbaudran
Discovered At
France
Word Origin
Named after "Samarskite" (a mineral)