Wyzant
Wyzant: Chemistry: Terms
This lesson provides a list of chemical terms, defines them, and uses examples to describe and explain each. These include allotropes, ionic compounds, methane, carbon dioxide, alkali flats, blue vitriol, and others.
University of Illinois
University of Illinois: Illinois State Water Survey: Simplified Nitrogen Cycle
A semi-technical description of the nitrogen cycle. Contains a link to an abridged version of the page along with a list of further resources on the topic.
Shodor Education Foundation
Shodor: Acid Base Chemistry
This Shodor Education Foundation page has a nice look at the major theories of acids and bases in less than one page. There are very simple defintions.
Chemicool
Chemicool: Nitrogen
This site from Chemicool provides a set of data tables summarizing basic chemical and physical properties of nitrogen.
ClassFlow
Class Flow: Nitrogen
[Free Registration/Login Required] In this flipchart, students are introduced to the element nitrogen, its gaseous state, atomic structure, and how it combines with hydrogen to form ammonia.