P8+-+Actinides

=**__Actinides__**=

They are HIGHLY RADIOACTIVE and very unstable. They lose protons in mill-seconds or years and become a different stable element.
Only five of the elements are found in nature.

**Elements that are Actinides**

 * Ac-Actinium
 * Th-Thorium
 * Pa-Protactinium
 * U-Uranium
 * Pu-Plutonium
 * Am-Americium[[image:http://www.cartage.org.lb/en/themes/sciences/Chemistry/Generalchemistry/Elements/onlibeinteractive/Americium/b0095.gif width="264" height="262" align="right" caption="Bohr's Atomic Model of Americium"]]
 * Cm-Curium
 * Bk-Berkelium
 * Cf-Californium
 * Es-Einsteinium
 * Fm-Fermium
 * Md-Mendelevium
 * No-Nobelium
 * Lr-Lawrenicium

Physical Properties
Actinides are solids at room temperature. Actinides melt between 1050-640 degrees celcius, but some don't melt. Actinides have 89 to 103 protons. Actinides average atomic mass is between 227 and 262.

Chemical Properties
Actinides are extremely radioactive. Actinides are not flammable. Actinides deteriorate into other substances by losing protons.

Periodic Table
They are found on the periodic table in group three, period seven. =__**Work Cited**__=


 * The Properties of Elements and Compounds(book)
 * Terminello, Louis J. "Uncovering the Secrets of Actinides." //Www.llnl.gov//. Lou Terminello, June 2000. Web. 26 Oct. 2009. .
 * Bentor, Yinon. __Chemical Element.com - Actinium__. Oct. 22, 2009 
 * Adroam Dingle, Basher.The Periocic Table 2007
 * //Physical Science//. Boston: Pearson, 2009. Print.
 * Barbalace, Kenneth L. "Periodic table of elements." //Www.Environmental Chemistry//. J.K Barbalce Inc., 1995-2009. Web. 26 Oct. 2009. [].
 * //Actinium//. Photograph. //Periodictable//. Wolffram reaserch. Web. 26 Oct. 2009. [].
 * Courtecuisse, Mathieu. //Uranium//. Photograph. //Energy.sia-conseil//. Sia Conseil, 2009. Web. 26 Oct. 2009. [].
 * //Bohr Model of Amaricium//. Photograph. //Chemical Elements//. Web. 26 Oct. 2009. []