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

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

Grade:12th pass

1 Answers

Pawan Prajapati
askIITians Faculty 60787 Points
3 years ago
A sodium atom has 11 electrons in its orbits, hence its atomic number is also 11 and has the same number of protons and electrons. Thus, its electronic configuration is K-2; L-8; M-1; The one electron in the M shell is lost and it obtains a positive charge since it has one more proton than the electrons, and obtains a positive charge, Na+. Now, the configuration is K-1; L-8 and it is a filled state. Hence, it is very stable so it is difficult to remove the electron from a filled state.

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