La	Z =  57	◊ ◊ ◊ ◊ ◊	Lanthanum
			From the Greek "lanthanein", meaning "to lie hidden"
(AM) Atomic Mass	138.9055  amu	♦	Oxidation States	+3
(BP) Boiling Point	3454  °C	♦	(MP) Melting Point	920  °C
(ρ) Density	6.16  g/cm3	♦	Crystal Structure	Hexagonal
( χ ) Electronegativity	1.1	♦	(AR) Atomic Radius	1.69  Å
Physical State	Solid	♦	(C) Heat Capacity	0.195  J/g °C
Electronic-Config	[Xe]  5d1  6s2	♦	(I1) First Ionization E	538.39  kJ/mol
(ΔHvap) Heat of Vaporization	402.1  kJ/mol	♦	(ΔHfus) Heat of Fusion	6.2  kJ/mol
Year of Discovery	1839	♦	Location of Discovery	Sweden
(E°) Standard Potential	La3+⇔ La (-2.379 V)
Stable isotopes	139La
Discovered/Synthesized by	Carl Gustaf Mosander
Natural Source	The mineral/ore bastnasite, monazite, loparite
Common Uses	Optical glass, telescope eyepieces, camera lenses, lighter flints, arc lamps
Other Info	Used for anodes of nickel-metal hydride batteries
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