Electron   A sub-atomic particle with a negative charge of 1.60 × 10^-19 coulombs and a mass of 9.11 × 10^-31 kg. Electrons are generally found around the nucleus of an atom, but may be gained or lost during ion formation. Compare to the proton.

Used in the following modules: Acids and Bases, Atomic Theory I, Atomic Theory II, Chemical Bonding, Chemical Equations, Chemical Reactions, Data: Using Graphs and Visual Data, Matter: States of Matter, Minerals III, Nuclear Chemistry, Organic Chemistry, Research Methods: Modeling, Research Methods: The Practice of Science, Teaching Effectively with Multimedia, The Mole, The Periodic Table of Elements, The Process of Science, Water