[ key-shel ]
/ ˈkeɪˌʃɛl /
the first shell of electrons surrounding the nucleus of an atom and containing, when filled, two electrons having principal quantum number 1.
The Strangest Winter Olympic EventsLet's take a look at these mysterious sports that made it to the big-league, (and, we'll define 'em, too).
Origin of K-shell
First recorded in 1965–70
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019