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3:08
Francium - Periodic Table of Videos
Throwing Francium into water would be "the YouTube video of the century" according to our ...
published: 06 Oct 2008
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1:10
Alkali Metals- why dont use Francium in Lab Experiments
Reaction between Alkali Metal and water for educational purpose only....
published: 21 Apr 2011
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5:16
Alkali metals:brainiac, open university and Francium clips
3 cool clips brought together with Loser by Beck intro. Group one alkali metals reacting w...
published: 16 Oct 2012
author: amerywordart
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2:58
Francium with English Sub - Hatsune Miku - sm6460566 - HQ
From Nico Video: sm6460566 HQ Version http://www.youtube.com/watch?v=Ozs079hRq8c&fmt;=18 Tr...
published: 28 Mar 2009
author: lordxwillie
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13:34
Why can't I get any francium?
Mr. Key outlines the factors that contribute to observed trends in the periodic table, cul...
published: 17 Feb 2014
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0:28
Francium Bomb in Ocean
the military ship gets completely totaled in the end....
published: 03 Nov 2009
author: nuggy101
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1:39
Alkali Metals - 03 Francium
Introducing the biggest and least stable element in Group 1 - radioactive Francium. From t...
published: 09 Jul 2013
author: wwwRSCorg
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3:15
Project DIVA F 2nd [EDIT PLAY] ★++10 Excellent "[EXX] Francium"
Music: Francium feat. Hatsune Miku Music & lyric by チータン Editor: J-knz PSN ID: J-knz Music...
published: 22 Apr 2014
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1:15
Francium Bomb test in the Pacific
a very reactive substance......
published: 15 Sep 2007
author: DropParties
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3:16
Reaction (Explosion) of Alkali Metals with Water
DO NOT TRY THIS! Alkali Metals react with water to produce that metal's hydroxide and libe...
published: 07 Mar 2014
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0:22
Francium Reacts With Water
Do not try this at home....
published: 03 Mar 2014
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0:42
[RealLife] Final Valley: Reaction of Francium in River
Hydrogen burns with a 'pop' sound but Francium reacts in cold water with a 'BOOM!!!!!!!' s...
published: 18 Nov 2013
author: Lycan Thrope
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3:02
【Project DIVA F】 Francium 【エディットPV】
へんなの作りました。譜面ありますがPVのみです。音量注意...
published: 01 Jun 2013
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4:37
Reacting Fluorine with Caesium - First Time on Camera
In preparation for the 2012 Christmas Lectures Dr Peter Wothers heads off to the Universit...
published: 27 Dec 2012
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2:57
【健音テイ】 francium 【UTAUカバー】
http://www.nicovideo.jp/watch/sm15757476 10/1 は テイの日!!! ということで今度は『日本語以外部門』(?)としてこの曲をカバーさせて...
published: 01 Oct 2011
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2:56
Nanahira - Francium
New song from Osu! Go try out the (unranked) map here~ https://osu.ppy.sh/s/74792 guttou k...
published: 18 Apr 2013
author: djnoobcake
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2:55
Franciumを歌ってみた【ななひら】
この動画はAndroid端末からアップロードされました。...
published: 06 Aug 2011
author: simosimosyou
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3:33
【Project Diva F ENGLISH】【10★】 Francium PV+Notes Edit
Converted from the JP Diva F, Credit to original creator. EU&NA; Edit Data: http://www.med...
published: 19 Dec 2013
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0:38
Why Not To Use Francium Laundry Detergent
Just Don't....
published: 02 Jan 2008
author: Jake Sanders
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3:20
【初音ミク】 Francium 【Project DIVA F 2nd EDIT】
PSN ID: hisokeee Music: http://www.mediafire.com/download/o6dbgjrg25bi6q1 Imported From D...
published: 19 Apr 2014
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2:58
Hatsune Miku - Francium
She's gone maverick! Yeah, sure, I can do non-Team Nekokan, video-less songs by random peo...
published: 24 Mar 2009
author: vgperson
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2:58
Osu! - Nanahira - Francium [X.T1Y]
More?? Check out my Osu! Playlist: https://www.youtube.com/playlist?list=PL2VE7sBBpeTKHy83...
published: 05 Jan 2015
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2:56
MMD(CreepyPasta) - Francium
BEST. MOTION. EVEEEEER X'D LMFAO! You know what Francium is? It's a Chemical Element XD ...
published: 12 Oct 2014
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2:56
Kasane Teto: Francium [MMD]
todos los agradecimientos a BoomBangprojet su canal https://www.youtube.com/user/BoomBangp...
published: 02 May 2014
author: Baster037
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Francium (/ˈfrænsiəm/ FRAN-see-əm) is a chemical element with symbol Fr and atomic number 87. It was formerly known as eka-caesium and actinium K. It is one of the two least electronegative elements, the other being caesium. Francium is a highly radioactive metal that decays into astatine, radium, and radon. As an alkali metal, it has one valence electron.

Bulk francium has never been viewed. Because of the general appearance of the other elements in its periodic table column, it is assumed that francium would appear as a highly reflective metal, if enough could be collected together to be viewed as a bulk solid or liquid. However preparing such a sample is impossible, since the extreme heat of decay (its longest isotopic half life is only 22 minutes) would immediately vaporize any viewable quantity of the element.

Francium was discovered by Marguerite Perey in France (from which the element takes its name) in 1939. It was the last element discovered in nature, rather than by synthesis. Outside the laboratory, francium is extremely rare, with trace amounts found in uranium and thorium ores, where the isotope francium-223 continually forms and decays. As little as 20–30 g (one ounce) exists at any given time throughout the Earth's crust; the other isotopes are entirely synthetic. The largest amount produced in the laboratory was a cluster of more than 300,000 atoms.




This page contains text from Wikipedia, the Free Encyclopedia - http://en.wikipedia.org/wiki/Francium

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