Question

Na+ has completely filled K and L shells. Explain.​

Answer 1

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Normally an atom of sodium has 11 electrons, so according to formula it has 2 electrons in K shell , 8 electrons in L shell and 1 electron in M shell. However Na+ has 10 electrons only, therefore it has 2 electrons in K shell and 8 in L shell. ... Hence it is said ' Na+ has completely filled K and L shells.

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