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.
Developers / API. Open Library has developed a suite of APIs to help developers get up and running with our data. We encourage interested developers to join the ol-tech mailing list to stay up-to-date with the latest news, or dive in with our own development team at our bug tracker or our GitHub source code repository.