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KEY FACTS Symbol - Fr Atomic # - 87 Atomic Mass - 223 Family - Group 1A (Alkali Metals) Pronounced - FRAN-see-um
USES No uses because it is so rare, but scientists want to learn composition of matter by studying it.
Bibliography Chemical Elements: From Carbon to Krypton. Vol. 1. David E. Newton. Detroit, MI. UXL, 2006. "Francium (revised)." Chemical Elements: From Carbon to Krypton. Ed. Lawrence W. Baker and David E. Newton. Vol. 1. Detroit: UXL, 2006. Gale Virtual Reference Library. Gale. Hollis/Brookline High School. 3 June 2008 . Maguire, Michael E. "Alkali Metals." Chemistry: Foundations and Applications. Ed. J. J. Lagowski. Vol. 1. New York: Macmillan Reference USA, 2004. 32-33. Gale Virtual Reference Library. Gale. Hollis/Brookline High School. 3 June 2008 http://go.galegroup.com/ps/start.do?p=GVRL&u=nhais_htis. Nechaev, I.; Jenkins, G. W.; and Van Loon, Borin (1997). Chemical Elements: The Exciting Story of Their Discovery and of the Great Scientists Who Found Them. Jersey City, NJ: Parkwest Publications. Rossotti Hazel (1998). Diverse Atoms: Profiles of the Chemical Elements. New York: Oxford University Press.
DISCOVERY/NAMING -One of the last natural elements to be discovered. -Discovered by Marguerite Perey (French physicist). -Studied the radioactive decay of actinum. -Found that 99% of decayed actinum atoms form thorium, remaining 1% form francium. -Named after France (Homeland of Perey).
FRANCIUM IS RARE! Francium may be the rarest element found on Earth. Scientists believe that no more than 15 grams of francium exist in the Earth's crust. That's less than one ounce!
Health Scientists know too little about the element to fully know its health effects. However, since it is a highly radioactive element, it does have a possiblity to have bad effects on human health.
Francium is not extracted from Earth's crust.
USES & COMPOUNDS -No uses because of its rarity, but scientists study it to learn composition of matter. -No important compounds with francium.
PHOTO CREDIT -http://periodictable.com/Samples/087.4/s9s.JPG -http://www.hse.k12.in.us/staff/ebrown/elements/ 1/francium/Francium%20model.gif
...by Genevieve Beaulieu
F R A N C I U M
