The periodic table - classification of elements. Definitions of groups, periods, alkali metals, alkaline earth metals, halogens, and noble gases. How metals, non-metals, and metalloids can be identified by the position on the periodic table. Created by Jay. Introduction to the periodic table. The periodic table - classification of elements. Groups of the periodic table. Counting valence electrons for main group elements.
OPENBook is software developed for blind and visually impaired individuals to read, edit, and manage scanned images from books, magazines, manuals, bills, newspapers, and other printed documents. It essentially turns your computer system into a scanning and reading machine.
Logos Bible Software. Logos Bible Software is a digital library application designed for electronic Bible study. In addition to basic eBook functionality, it includes extensive resource linking, note-taking functionality, and linguistic analysis for study of the Bible both in translation and in its original languages. It is developed by Faithlife Corporation.