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M-shell

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WordReference Random House Unabridged Dictionary of American English © 2025

M-shell n. [Physics.]

Physicsthe third shell of electrons surrounding the nucleus of an atom and containing, when filled, 18 electrons having principal quantum number three. Cf. K-shell, L-shell, N-shell.

1920–25

'M-shell' also found in these entries (note: many are not synonyms or translations):

K-shell - L-shell - M-line - N-shell

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