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L-shell

American  
[el-shel] / ˈɛlˌʃɛl /

noun

Physics.

  1. the second shell of electrons surrounding the nucleus of an atom and containing, when filled, eight electrons having principal quantum number 2.

Etymology

Origin of L-shell

First recorded in 1925–30

Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023

Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.