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- Lanthanum (10184 bytes)
102: ...f the most reactive of the rare-earth metals. The metal reacts directly with elemental [[carbon]], [[nit...
110: ...(optics)|lenses]], because of the high refractive index and low dispersion of rare-earth glasses.
113: ... to [[molybdenum]] decreases the hardness of this metal and its sensitivity to temperature variations. ...
114: * [[Mischmetal]], a [[pyrophoric]] alloy used e.g. in lighter f...
137: ...are less than 1 minute. This element also has 3 [[meta state]]s. - Thorium (11307 bytes)
19: | [[Transition metal]]s
153: ... all oxides (3300?C). When heated in air, thorium metal [[turnings]] ignite and burn brilliantly with a ...
164: ...glass]] helps create glasses of a high refractive index and with low dispersion. Consequently, they find ...
174: ...]], the [[norse mythology|Norse god]] of war. The metal had virtually no uses until the invention of the...
185: ...orily solved) in reprocessing. Much development work is still required before the thorium fuel cycle c...
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