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Pastimes : Why do Gurus Spontaneously Combust?

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To: sandintoes who wrote (452)4/22/2000 9:11:00 PM
From: lorrie coey  Read Replies (1) of 503
 
Note: Associated with yttrium are certain rare elements, as erbium, ytterbium, samarium, etc., which are separated in a pure state with great difficulty. They are studied by means of their spark or phosphorescent spectra. Yttrium is now regarded as probably not a simple element, but as a mixture of several substances.

From WordNet (r) 1.6 (wn)

yttrium n : a silvery metallic element that is common in rare-earth minerals; used in magnesium and aluminum alloys
[syn: {Y}, {atomic number 39}]

From The Elements (22Oct97) (elements)

yttrium Symbol: Y Atomic number: 39 Atomic weight: 88.905 Silvery-grey metallic element of group 3 on the
periodic table. Found in uranium ores. The only natural isotope is Y-89, there are 14 other artificial isotopes. Chemically resembles the lanthanoids. Stable in the air below 400 degrees, celsius.

Discovered in 1828 by Friedrich Wohler.
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