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Structure of the Atom — Science STD 9 — Question

CBSE BoardEnglish MediumSTD 9ScienceStructure of the Atom2 Marks
Question
Na+ has completely filled K and L shells. Explain.
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Answer

Na has atomic number 11, so its electronic configuration is = 2, 8, 1 When it gives away its outermost shell single electron it changes to Na+ = 10 = 2, 8 The above configuration indicates completely filled K, L shells.

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