Periodic Table of the Elements: Protactinium — Infoplease.com

	Site Map \| FAQ in Daily Almanac for Dec 5, 2009 Search White Pages
Skip Navigation Home Winter Holidays Atlas Encyclopedia Dictionary Thesaurus Features Quizzes Timelines Countries Slideshows

Fact Monster Kid's reference,
games, quizzes

Editor's Favorites

Periodic Table of the Elements: Protactinium
Atomic Number:	91
Atomic Symbol:	Pa
	Protactinium
Atomic Weight:	231.0359
Electron Configuration:	2 · 8 · 18 32 · 20 9 · 2

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

More on Periodic Table of the Elements Protactinium from Infoplease:

Encyclopedia: Compounds and Elements - Encyclopeadia articles concerning Compounds and Elements.

See more Encyclopedia articles on: Compounds and Elements

Premium Partner Content

HighBeam Research

Related content from HighBeam Research on: Periodic Table of the Elements: Protactinium

A chemical glance at short-lived elements. (Science News)

The symbols of the chemical elements. (Word Ways)

Table talk (Natural History)

A magical pair of 6x6 chemical squares. (Word Ways)

Additional search results provided by HighBeam Research, LLC. © Copyright 2005. All rights reserved.

Infoplease Tools