It's Elemental

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The Periodic Table of Elements

The following primary sources were used in the creation of this site:

Physical Data:

CRC Handbook of Chemistry and Physics, 77th Edition

Historical and Usage Information:

CRC Handbook of Chemistry and Physics, 77th Edition
Exploring Chemical Elements and their Compounds; David L. Heiserman, 1992

Mineral Formulas:

United States Geological Survey - Mineral Resources Program
Mindat.org - The Online Mineralogy Resource
The Mineral Gallery
The Mineral and Gemstone Kingdom
Mineralogy Database

Radioisotope Half-life and Decay Modes:

National Nuclear Data Center
Lawrence Berkeley Laboratory