Fermium (Fm)

General Properties

Symbol Fm
Atomic Number 100
Atomic Weight (257)
Group
(Actinoids)
Actinide, Radioactive, Synthetic
Period 7
Block f

Physical Properties

Density --
Atomic Volume cm3/mole
Atomic Radius --
Covalent Radius --
Crust Abundance None
Crystal Structure Unknown

Energy

Electronegativity 1.3 (Pauling Scale)
Electron Affinity --
1st Ionization Energy 627 kJ/mol
Specific Heat Capacity J g−1 K−1
Thermal Conductivity 10.0 W·m−1·K−1

Electrons & Oxidation

Oxidation States 3
Electrons Per Shell 2 8 18 32 30 8 2
Electron Configuration [Rn] 5f12 7s2
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 5f12 7s2
Orbital Diagram
1s
↿⇂
2s
↿⇂
2p
↿⇂
↿⇂
↿⇂
3s
↿⇂
3p
↿⇂
↿⇂
↿⇂
3d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4s
↿⇂
4p
↿⇂
↿⇂
↿⇂
4d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
4f
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
5s
↿⇂
5p
↿⇂
↿⇂
↿⇂
5d
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
5f
↿⇂
↿⇂
↿⇂
↿⇂
↿⇂
↿ 
↿ 
6s
↿⇂
6p
↿⇂
↿⇂
↿⇂
6d
 
 
 
 
 
6f
 
 
 
 
 
 
 
7s
↿⇂
7p
 
 
 
7d
 
 
 
 
 
7f
 
 
 
 
 
 
 

Nuclear

Radioactive Yes
Half Life 100.5 d
Lifetime 145.02d
Decay Alpha Emission

Media

Planetary Bohr Model of Fermium (Fm)
Lewis Dot Diagram of Fermium (Fm)
Description
Synthetic radioactive metal.
Uses
It has no significant commercial applications.
Sources
Produced by bombarding lighter transuranium elements with still lighter particles or by neutron capture.
Pronounciation (English)
FER-mi-em

Translations

Afrikaans Fermium
Aragonese Fermio
العربية فرميوم
Armãneashte Fermiumu
asturianu Fermiu
azərbaycan dili Fermium
български Фермий
বাংলা ফার্মিয়াম
brezhoneg Fermiom
bosanski Fermij[um]
Byelorussian Фермій
Cebuano Fermyo
čeština Fermium
Chuvash Ферми
Cymraeg Fermi
dansk Fermium
Deutsch Fermium
Ελληνικά Φερμιο
English Fermium
esperanto Fermio
español Fermio
eesti Fermium
euskara Fermioa
فارسی فرمیم
suomi Fermium
føroyskt Fermium
français Fermium
furlan Fermi
West-Frysk Fermium
Gaeilge Fearmiam
Gàidhlig Feirmiam
galego Fermio
ગુજરાતી ફર્મિયમનો
Gaelg Fermium
Hakka Chinese Fi (鐨)
עברית פרמיום
हिन्दी फर्मियम
hrvatski Fermij
magyar Fermium
հայերեն Ֆերմիում
Indonesia Fermium
íslenska Fermín
italiano Fermio
日本語 フェルミウム
ქართული ფერმიუმი
کٲشُر Ferm
қазақ тілі Фермий
한국어 페르뮴
Kurdish Fermiyûm
Komi Фермий
kernewek Fermyum
кыргызча Фермий
Latin Fermium
Lëtzebuergesch Fermium
Lombard Férmi
lingála Femu
lietuvių Fermis
latviešu Fermijs
Mari Фермий
Maori Fermium
македонски Фермиум
മലയാളം ഫെര്‍മിയം
монгол Ферми
Мокшан Ферми
Bahasa Melayu Fermium
Malti Fermju[m]
Nahuatl Fermio
Nederlands Fermium
norsk Fermium
Occitan Fermi
ирон Фермий
polski Ferm
português Férmio
Runasimi Fermyu
română Fermiu
русский Фермий
slovenčina Fermium
slovenščina Fermij
Samoan Fermimi
Samogitian Fermis
shqip Fermium
српски Фермијум
Southern Sotho Fermiamo
svenska Fermium
Kiswahili Fermi
தமிழ் பெர்மியம்
Tajik Фермий
ไทย เฟอร์เมียม
Türkçe Fermiyum
ئۇيغۇرچە فېرمىي
українська Фермій
o‘zbek Fermiy
Tiếng Việt Fecmi
Võro Fermium
中文

History

Discovered In
1952
Discovered By
Workers at Argonne, Los Alamos, USA, and the University of California at Berkeley, USA.
Discovered At
USA
Word Origin
Named after "Enrico Fermi"