Compounds and Elements

World Encyclopedia The Columbia Encyclopedia, 6th ed. Further reading

yttrium

World Encyclopedia | 2005 | Copyright

yttrium (symbol Y) Silver-grey, metallic element in group III of the periodic table. First isolated in 1828 by German chemist Friedrich Wöhler, it is found with lanthanide elements (rare-earth metals) in monazite sand, bastnasite, and gadolinite. It resembles the lanthanides in its chemistry. Yttrium was found in lunar rock samples collected by the Apollo 11 space mission. Its compounds are used in phosphors and communications devices, such as colour television picture tubes and superconducting ceramics. Properties: at.no. 39; r.a.m. 88.9059; r.d. 4.47; m.p. 1523°C (2773°F); b.p. 3337°C (6039°F); most common isotope Y⁸⁹ (100%).

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Periodic Table of the Elements: Yttrium

The Columbia Encyclopedia, 6th ed. | 2011 | Copyright

Periodic Table of the Elements: Yttrium

Periodic Table of the Elements: Yttrium

Atomic Number:	39
Atomic Symbol:	Y
	Yttrium
Atomic Weight:	88.90585
Electron Configuration:	2 · 8 · 18 9 · 2

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