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L-shell

[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.
Compare K-shell, M-shell, N-shell.
Origin
1925-1930
1925-30
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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