Science / Periodic Table of Elements / Electron Configuration: The distribution of electrons according to the energy sublevels (subshells) in uncharged atoms. The noble gas shown in square brackets (e.g. [He]), marks that all the subshells associated with that element are fully occupied by electrons.
Science / Chemistry / Valence Electron: Electrons that can be actively involved in chemical change; usually electrons in the shell with the highest value of n. For example, sodium's ground state electron configuration is 1s2 2s2 2p6 3s1; th MORE
Technology / Home Audio / Electronic Shock Protection (ESP): An electronic circuit that stores the audio data stream from a CD or MD in a memory buffer. If the laser pick-up mistracks, audio still flows from the buffer preventing an interruption. MORE
Technology / Cell Phones / Electronic Serial Number (ESN): The unique identification number embedded in a wireless phone by the manufacturer. Each time a call is placed, the ESN is automatically transmitted to the base station so the wireless carrier's mobile MORE
Entertainment / Photography / Electronic Shutter: Shutter system timed by electronic rather than mechanical means. MORE
Technology / Radar / Electronic Protection (EP): Electronic protection (ep) aims to ensure continued friendly use of the electromagnetic spectrum despite adversary ea and es. MORE