Periodic Table of the Elements: Thulium — Infoplease.com

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Periodic Table of the Elements: Thulium
Atomic Number:	69
Atomic Symbol:	Tm
	Thulium
Atomic Weight:	168.9342
Electron Configuration:	2 · 8 · 18 31 · 8 · 2

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved.

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