Francium (Fr)

General Properties

Symbol Fr
Atomic Number 87
Atomic Weight (223)
Group
1 (alkali metals or hydrogen family/lithium family)
IA (IUPAC), IA (CAS)
Solid, Alkali Metal, Metal, Radioactive, Natural
Period 7
Block s

Physical Properties

Density --
Atomic Volume cm3/mole
Atomic Radius 2.7 angstroms
Covalent Radius --
Crust Abundance N/A
Crystal Structure Cubic: Body centered
Color Silver

Electrons & Oxidation

Oxidation States 1
Electrons Per Shell 2 8 18 32 18 8 1
Electron Configuration [Rn] 7s1
1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 4d10 5s2 5p6 4f14 5d10 6s2 6p6 7s1
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 21.7 m
Lifetime 31.7m
Decay Beta Decay

Media

Planetary Bohr Model of Francium (Fr)
Lewis Dot Diagram of Francium (Fr)
Description
Highly rare and unstable, radioactive metal.
Uses
Since its isotopes have such short half-lives there are no commercially significant compounds of francium.
Sources
Formed by decay of actinium. Chemical properties similar to cesium. Decays to radium or astatine.
Pronounciation (English)
FRAN-si-em

Translations

Afrikaans Fransium
Aragonese Franzio
العربية فرنسيوم
Armãneashte Frantsiumu
asturianu Franciu
azərbaycan dili Fransium
български Франций
বাংলা ফ্রান্সিয়াম
brezhoneg Fra'siom
bosanski Francij[um]
Byelorussian Францый
Cebuano Pransyo
čeština Francium
Chuvash Франци
Cymraeg Franci
dansk Francium
Deutsch Franzium
Ελληνικά Φραγκιο
English Francium
esperanto Francio
español Francio
eesti Frantsium
euskara Frantzioa
فارسی فرانسیم
suomi Frankium
føroyskt Francium
français Francium
furlan Franci
West-Frysk Francium
Gaeilge Frainciam
Gàidhlig Frainciam
galego Francio
ગુજરાતી ફ્રાન્સિયમનો
Gaelg Frankium
Hakka Chinese Fap (鍅)
עברית פרנסיום
हिन्दी फ्रान्सियम
hrvatski Francij
magyar Francium
հայերեն Ֆրասիում
Indonesia Fransium
íslenska Fransín
italiano Francio
日本語 フランシウム
ქართული ფრანციუმი
کٲشُر Frãs
қазақ тілі Франций
한국어 프랑슘
Kurdish Fransiyûm
Komi Франций
kernewek Frankyum
кыргызча Франций
Latin Francium
Lëtzebuergesch Franzium
Lombard Franc
lingála Fansu
lietuvių Francis
latviešu Francijs
Mari Франций
Maori Francium
македонски Франциум
മലയാളം ഫ്രാന്‍സിയം
монгол Франци
Мокшан Франци
Bahasa Melayu Fransium
Malti Fransjum, ²Franċju
Nahuatl Francio
Nederlands Francium
norsk Francium
Occitan Franci
ирон Франций
polski Frans
português Frâncio
Runasimi Fransyu
română Franciu
русский Франций
slovenčina Francium
slovenščina Francij
Samoan Frankimi
Samogitian Francis
shqip Francium
српски Францијум
Southern Sotho Frankiamo
svenska Francium
Kiswahili Fransi
தமிழ் பிரன்சியம்
Tajik Франсий
ไทย แฟรนเซียม
Türkçe Fransiyum
ئۇيغۇرچە فرانسىي
українська Францій
o‘zbek Fransiy
Tiếng Việt Franxi
Võro Frantsium
中文

History

Discovered In
1939
Discovered By
Marguerite Perey
Discovered At
France
Word Origin
Named after "France"