Lanthanum

= Lanthanum = By: Claire


 * Atomic Number:** 57.


 * Protons:** 57


 * Electrons:** 57


 * Neutrons:** 82


 * Average Atomic Mass:** 138.90547.


 * Isotopes:** There are isotopes 117-151. 138La is the most stable isotope.


 * Discovery:** Carl Gustav Mosander discovered lanthanum by extracting in impure nitrate from the element, cerium.


 * Name:** Lanthanum means "hidden" in Greek. Mosnader named this element that, because lanthanum had been hidden so well on other elements.

- making of optical glasses. - used in making resistant glass. - used in carbon lighting applications, especially by the motion picture industry for studio lighting and projection. -vacuum tubes. -improves the malleability of steal.
 * Uses:** - alloys.

- lanthanum is $64 a gram. -it is malleable, ductile, and can be cut with a knife. -it is the most reactive out of the rare earth metals. -when exposed into the air, it oxidizes quickly.
 * Interesting Facts**: - it is never found in nature


 * Video:** media type="youtube" key="Q21clW0s0B8" height="364" width="445"


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