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sarah petrbok

on 22 May 2015

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Transcript of Francium

Physical Properties
Chemical Properties
Human Interactions
Compound: Formula:
Francium Sulfide Fr2S 478.065
Francium Phosphide Fr3P 699.9738
Francium Bromide FrBr 302.904

No stable isotopes
Heat of Fusion: 9.39 kJ/mol
Electrochemical Equivalent: 8.3209g/amp-hr
Electronegativity: 0.7 (Pauling); 0.86 (Allrod Rochow)
Francium currently has no uses outside of basic scientific research due to the lack of production and its short-life.
As a radioactive element, however, it does pose a threat to human health.
Discovered by a French Chemist named Marguerite Catherine Perey
Discovered in 1939
Was discovered accidentally while analyzing actinium's decay seguence
Radioactive decay: the breakdown of an atomic nucleus resulting in the release of energy and matter from the nucleus
Scientists estimate that there is no more then one ounce of francium in the earths crust at one time.
Due to the fact that there is lack of this element in the earths crust, scientists have to produce francium to study it.
It is the most unstable of the first 103 elements in the periodic table.
Its longest lived isotope has a half life of 22 minutes.
Francium is the heaviest simple atom
Francium is the 2nd rarest element in the crust, after astatine.
Facts about Francium

"The Element Francium." It's Elemental -. Ed. Steve Gagnon. Thomas Jefferson National Accelerator Facility - Office of Science Education, n.d. Web. 14 May 2015. <http://education.jlab.org/itselemental/ele087.html>.

Stewart, Doug, PHD. "Francium Element Facts." Chemicool. Massachusettes Institute of Technology, 1996. Web. 15 May 2015. <http://www.chemicool.com/elements/francium.html>.

Bentor, Yinon. Chemical Element.com - Francium. May 21, 2015 <http://www.chemicalelements.com/elements/fr.html>.
Radioactive Decay
Silver, gray/ metallic
Atomic size: 348 pm (picometer-)
Atomic weight: 223
Protons: 87
Neutrons: 0
Electrons: 87
Alkali Metal- very reactive metals, good conductors of heat
Group: 1
Period: 7
Boiling point: 677 C
Melting point: 27 C
Full transcript