K-shell

[key-shel]

Phonetic (Standard)IPA

noun

Physics.

the first shell of electrons surrounding the nucleus of an atom and containing, when filled, two electrons having principal quantum number 1.

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Word History and Origins

Origin of K-shell¹

First recorded in 1965–70

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Example Sentences

Examples have not been reviewed.

However, because the K-shell transition lines of chromium and manganese are weak and those of iron and nickel are very close in photon energy, high-resolution spectroscopy is required for an accurate determination of the abundances of these elements.

From

Kshatriya ksi

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