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Q. 9.    Na^{+} has completely filled K and L shells. Explain.

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The atomic number of Na = 11

No. of electrons in Na atom = 11

In Na^{+} ,the positive charge is obtained due to the loss of one electron from M shell of Na atom.

So, No. of electrons in Na+ ion = 11 -1 = 10

Hence, electronic configuration of Na+ = 2, 8

In Na+, K and L shells are completely filled since K shell can have a maximum of 2 electrons and L shell can have a maximum of 8 electrons.

Posted by

Pankaj Sanodiya

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