This pre-print from the Stanford Linear Accelerator Center (SLAC) demonstrates the detection of single electrons in ethane at 1 bar through the use of four GEMs operating in tandem and coupled to pad readout. The paper, available for download in .pdf or .ps format, presents "measurements of single electron pulse height distributions, total gas gain measurement and calculation, pad-to-pad...

The Atomic Orbitals Web site "was established as part of an (ongoing) project at Purdue University to develop 'visualization modules' for general chemistry students." Using the Chime plug-in, which allows unique and stunning visualizations, visitors can learn what an atomic orbital is; what the 1s, 2s, 3s, 2p, 3p, and 3d orbitals are; what hybrid orbitals are; and more. The combination of...

The College Board has developed the "AP Central" website to provide resources for teachers seeking to improve their students' performance on AP exams, including human geography, chemistry, and European history. This particular resource is from the AP chemistry course page, and it deals with common difficulties and misconceptions regarding electrochemistry. Written by Senior Lecturer Emeritus...