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.

 

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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 wi . . . View Full Definition

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 2 . . . View Full Definition

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 carrie . . . View Full Definition

Electronic Protection (EP): Electronic protection (ep) aims to ensure continued friendly use of the electromagnetic spectrum despite adversary ea and es.

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.

Electronic Shutter: Shutter system timed by electronic rather than mechanical means.

Electronic Ticket: A ' paperless ' airline ticket allowing one to check-in and fly with just proper photo id. What may look like a ticket is actually just a paper passenger receipt. E-tickets cannot be lost, o . . . View Full Definition

Electronic Support (ES): Electronic support aims to gain sufficient information about radar sensors to allow an understanding of the radar’s characteristics including its role, its method of operation, and its stren . . . View Full Definition

Electronic Program Guide (EPG): A chronological listing of all available programming covering an extended time period (typically covering a period of a few days). This listing displays on your TV screen.

Electronic Guns: The device in the CRT that produces the electron beam that is attracted to the phosphors on the face of the CRT: this activates the phosphors thus causing them to emit red, green or blue light.