Chemistry Websites

American Chemical Society
This is the primary professional organization for chemists. It includes educational resources and information about careers. It is a congressionally chartered organization that represents professionals at all degree levels and in all fields of chemistry.

BioMed Central
Search peer-reviewed, open access journals curated by a recognized leader in STEM publishing.

ChemCollective
Engaging online information and activities for chemistry education.

Chemistry
From Khan Academy, videos on introductory principles in Chemistry. 

Chemistry Examples
Examples of chemical questions that can be answered with Wolfram Alpha.

Chemistry for Life
American Chemical Society page.

Chemistry Functions
Conversion of calculations related to chemistry.

Interactive Periodic Table
The Royal Society of Chemistry's periodic table with lots of resources relating to the elements.

Internet Database of Periodic Tables
This is the only comprehensive database of periodic tables & periodic system formulations.

Organic Chemistry Portal: Name Reactions
This resource contains "information on the most important name reactions and keywords for the field of organic synthesis." Users can browse the alphabetical list of reactions to find relevant entries.

Organic Chemistry Portal: Osiris Property Explorer
This tool allows chemistry researchers to draw chemical structures and predict the following properties of various substances: "toxicity risk assessment, cLogP, solubility, molecular weight, fragment-based drug-likeness, and overall drug-likeness."

Ptable.com
An interactive Periodic Table for studying chemistry.

Visual Periodic Table
See examples of the elements.