Electron Configuration

Science / Chemistry / Electron Configuration: A list showing how many electrons are in each orbital or subshell. There are several notations. The subshell notation lists subshells in order of increasing energy, with the number of electrons in each subshell indicated as a superscript. For example, 1s2 2s2 2p3 means '2 electrons in the 1s subshell, 2 electrons in the 2s subshell, and 3 electrons in the 2p subshell.

Valence Electron

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

Electronic Shock Protection (ESP)

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

Electronic Serial Number (ESN)

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

Links
Home
Glossary
Thesaurus