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Periodic Table of the Elements: Lanthanum

Periodic Table of the Elements: Lanthanum

Atomic Number:	57
Atomic Symbol:	La
	Lanthanum
Atomic Weight:	138.9055
Electron Configuration:	2 · 8 · 18 18 · 9 · 2

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"Periodic Table of the Elements: Lanthanum." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. 24 Dec. 2009 <http://www.encyclopedia.com>.

"Periodic Table of the Elements: Lanthanum." The Columbia Encyclopedia, Sixth Edition. 2008. Encyclopedia.com. (December 24, 2009). http://www.encyclopedia.com/doc/1E1-La-ptblTABLE.html

"Periodic Table of the Elements: Lanthanum." The Columbia Encyclopedia, Sixth Edition. 2008. Retrieved December 24, 2009 from Encyclopedia.com: http://www.encyclopedia.com/doc/1E1-La-ptblTABLE.html

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