Periodic Table of the Elements Yttrium

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Periodic Table of the Elements: Yttrium

Periodic Table of the Elements: Yttrium

Atomic Number:	39
Atomic Symbol:	Y
	Yttrium
Atomic Weight:	88.9059
Electron Configuration:	2 · 8 · 18 9 · 2

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yttrium

World Encyclopedia | 2005 | Â© World Encyclopedia 2005, originally published by Oxford University Press 2005. (Hide copyright information) 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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