P8+-+Lanthanides

= Lanthanides = by: Nathan Schwartz & Brian Richards

__Lanthanides__- a series of elements with an increase in the atomic numbers that begin with __lanthanum__ or cerium and ends with lutetium


 * ====== La_57 -Lanthanum ======
 * ====== Ce_58 -Cerium ======
 * ====== Pr_59 -Praseodymium ======
 * ====== Nd_60 -Neodymium ======
 * ====== Pm_61 -Promethium ======
 * ====== Sm_62 -Samarium ======
 * ====== Eu_63 -Europium ======
 * ====== Gd_64 -Gadolinium ======
 * ====== Tb_65 -Terbium ======
 * ====== Dy_66 -Dysprosium ======
 * ====== Ho_67 -Holmium ======
 * ====== Er_68 -Erbium ======
 * ====== Tm_69 -Thulium ======
 * ====== Yb_70 -Ytterbium ======
 * ====== Lu_71 -Lutetium ======

//__Lanthanides Are Rare Earth Elements__//
Lanthanides were once known as the rare elements. That means that the chemists once thought that there were only in the earths crust in very little amounts. They are very dificult and expencive to produce.Lanthanoids are chemically similar to each other. Useful comparison can also be made with the actinoids. lanthanoids are typically placed below the main body of the periodic table in the manner of a footnote.This divide is reflected in the first two rare earths that were discovered:yttria in 1794 and ceria in 1803.All lanthanoids closely resemble lanthanum.

__//Words To Know//__
composition.
 * Alloy: ** Mixture of 2 or more metals with properties different from those of the metals of which it is made.
 * Catalyst: ** Material that gets a faster rate of a reaction without undergoing any change in its own
 * Monazite: ** Mineral that constitutes the major source of the lanthanides.
 * Oxide: ** Compound that has oxygen and one other element.
 * Phosphor: ** Element that glows when hit by electrons.

__//**Uses**//__
1. They are used in street lights ,neon lights ,search lights ,and lights in big stadiums. 2. When interacts with neon it gets fluorescent glow.

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//__Works Cited:__//
//Science Clarified//. Advameg, Inc., October 27, 2009. October 26, 2009. 