Position	Website	Change	Thumbnail
1	en.wikipedia.org - Wikipedia, the free encyclopedia	0
2	sigmaaldrich.com - Sigma-Aldrich: Analytical, Biology, Chemistry & Materials Science products and services.	0
3	americanelements.com - American Elements American Elements is a U.S. Registered Trademark	0
4	sciencedirect.com - ScienceDirect - Home	0
5	chemspider.com - ChemSpider | The free chemical database ChemSpider is a free chemical structure database providing fast access to over 26 million structures, properties and associated information.	0
6	pubs.acs.org - ACS Publications Home Page	0
7	chemicool.com - Periodic Table of Elements and Chemistry Award winning periodic table, with user-friendly element data and facts. Cool, online chemistry videos, dictionary, tools and forum.	0
8	iopscience.iop.org - IOPscience::.. Welcome! IOPscience is a unique platform for IOP-hosted journal content providing site-wide electronic access to more than 130 years of leading scientific rese...	0
9	lanthanum.atomistry.com - Element Lanthanum, La, Lanthanide All about Element Lanthanum, La, Lanthanide	0
10	link.springer.com - Home - Springer Providing researchers with access to millions of scientific documents from journals, books, series, protocols and reference works.	0
11	pubchem.ncbi.nlm.nih.gov - The PubChem Project PubChem homepage	0
12	ncbi.nlm.nih.gov - National Center for Biotechnology Information	0

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