Simon Fraser University
Chem1 Virtual Textbook: Sizes of Atoms and Ions
Acting as a subtopic of the General Chemistry Virtual Textbook's section on Atoms and the Periodic Table, this site seeks to answer the question, What do we mean by the "size" of an atom? Terms such as metallic radius, covalent radius,...
Frostburg State University
General Chemistry Online: The Periodic Table
This is a teacher's companion guide with lesson plans for the periodic table. It includes learning objectives, lecture notes, links to related sites, answers to frequently asked questions, and a glossary of related terms.