Uses Properties History Cost Glossary Bibliography	Lanthanum by Alex "If you want a camera that they use in Holly Wood make sure it has Lanthanum in it and then you're all good."	La 57
Uses   Lanthanum is used in expensive camera lenses. This is because it gives glass, light bending properties. It is also used in lighter flints.	Properties name Lanthanum atomic number 57 atomic mass 138.9 period 6 group 3 type of element metal physical state at room temperature solid number of electrons 57 number of protons 57 number of neutrons 81 color silvery white melting point 1193.2k texture soft, malleable density at 293k 6.79/cm3	History   Lanthanum was discovered by Carl Mosander. It comes from the Greek word lanthaneis ( to lie hidden.) It is obtained from monazite bastnasite. It is soft to cut with a knife and is one of the most reactive of the rare earth metals. it oxidizes completely when exposed to air.It reacts directly with elemental carbon, nitrogen, boron, selenium, silicon, phosphorus, sulfur, and with halogens. It has a low-moderate toxcicity rating.
Glossary     oxidizes -- To increase the positive charge or valence of (an element) by removing electrons atomic mass -- The mass of an atom atomic number -- The number of electrons inside an atom halogens -- Any of a group of five chemically related nonmetallic elements including fluorine, chlorine, bromine, iodine, and astatine. toxcicity rating -- The level of how toxic an element is		Cost Lanthanum is extremely expensive. It cost 5 dollars a gram. This is because it is used in many expensive camera lenses to give them light bending properties.
Bibliography http://www.chemicool.com David Hsu http://www.enviormentalchemistry.com/yogi/periodic KLB productions http://www.chemicalelements.com Yinon Bentor ull.chemistry.uakron.edu/perodic_table Los Alamos National Laboratory's chemistry division Pearl1.laaul.gov/periodic/default.htm Pheonix College chemlab.pc.maricopa.edu/periodic/periodic.htm University of Sheffield http://www.webelements.com/webelements/schoolor/copyright http://www.animfactory.com/animations/machines/cameras/movie_camera_crank_turn_md_wht.gif http://www.jimwalterresources.com/merch.html http://www.dictionary.com