Rob


 * Gallium**

toc

History
Gallium was discovered in France in 1875 by Lecoq de Boisbaudran. The sample he used came from the Pyrenees mountains, which are on the border of Spain and France. Since his first sample was not pure, he had to wait until later that year to obtain pure gallium. Prior to its discovery, Dmitri Mendeleev had predicted many of its chProxy-Connection: keep-alive Cache-Control: max-age=0 acteristics based on an open space in his periodic table of the elements. Lecoq de Boisbaudran was french and so he named gallium for his home, France, or in Latin, //Gallia.// Pure gallium is not found in nature and must be refined from other ores in the lab. Gallium is found throughout the crust of our planet, and is a common element.

Appearance
Pure gallium has a brilliant silver shine, and is often described as silvery-white. In the pure solid form it forms crystal-like structures, with smooth edges. Pure gallium is often found in the molten form, due to its low melting point. However, gallium is classified as solid by the periodic table, and so it can be deduced that this is the form in which gallium is most often found.

Temperature Properties
Freezing/Melting Point- Gallium freezes/melts at 29.78 ºC (85.61 ºF) Condensation/Boiling Point- Gallium condenses/boils at 2,403 ºC (4,357.4 ºF)

Interesting Properties
-Gallium, like water, expands when it solidifies. -Gallium melts if you hold it in your hand

Classification
Gallium is classified as a metal.

Isotopes-
Gallium has a total of 34 isotopes, some of which are radioactive.

Cost-
Gallium costs $3 a gram.

Applications
GaProxy-Connection: keep-alive Cache-Control: max-age=0 oxy-Connection: keep-alive Cache-Control: max-age=0 oxy-Connection: keep-alive Cache-Control: max-age=0 oxy-Connection: keep-alive Cache-Control: max-age=0 iProxy-Connection: keep-alive Cache-Control: max-age=0, mixed with arsenic or nitrogen, gallium is a key component in LEDs (light emmitting diodes). When combined with other metals, gallium is used to make semiconProxy-Connection: keep-alive Cache-Control: max-age=0 ctors in transistors and high temperature thermometers%2Proxy-Connection: keep-alive Cache-Control: max-age=0 due to its low melting point and high boiling point. GalProxy-Connection: keep-alive Cache-Control: max-age=0 um is also used in dental fillings.

3D Model
media type="custom" key="2688461"

Bibliography-
Davis, Raymond E. “Gallium.” World Book. 2001 ed. 2001. Gray, Theodore. “Pictures, Stories, and Facts about the Element Gallium in the Periodic Table.” PeriodicTable.com. 30 Oct. 2008. Wolfram Research, Inc. 18 Nov. 2008 . WikiAnswers. “WikiAnswers - What is the Cost of the Element Gallium.” WikiAnswers. Answer.com. 18 Nov. 2008 . Wikipedia. “Gallium.” Wikipedia. 18 Nov. 2008. Wikimedia Foundation, Inc. 18 Nov. 2008 . - - -. “Isotopes of Gallium.” Wikipedia. 27 Apr. 2008. Wikimedia Foundation, Inc. 18 Nov. 2008 . Winter, Mark. “WebElements Periodic Table of the Elements Gallium General Information.” WebElements. 2008. The University of Sheffield and WebElements Ltd, UK. 18 Nov. 2008 .

done!!!