Homepages of National Competitions

35 IChO in Greece Ministry of National Education and Religious Affairs

IChOs in France Olympiades Internationales de Chimie

Other International Science Olympiads

International Mathematical Olympiad (IMO): www.imo.math.ca

International Physics Olympiad (IPhO): www.jyu.fi

International Biology Olympiad (IBO): www.ibo-info.org

International Olympiad in Informatics (IOI): www.ioinformatics.org

Miscellaneous

 

Chemistry sites

ChemWeb Chemistry Portal chemweb.com

International Union of Pure and Applied Chemistry (IUPAC) iupac.org