Question

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

Answer 1

Yes bCz Na has 11 electrons in its K,L,M,N shells...It's atomic no. is. 11...it has 1 electron in outer most shell....it can donate its electron to complete anyone's octet....
And it has conpletely filled K n L shell bcz K shell Has 2 electron in it n L shell has 8 electron in it so Na has 2 electrons in K and 8 electrons in L...bcz Its ECG is 2,8,1 so we can say that it has completely filled K n L shells...
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Answer 2

• Na+  represent Sodium with atomic number 11. Which means it has 11 protons. Number of Electrons is equal to number of protons. So Sodium has 11 electrons in the outer shells distributed as  2 electrons in 'k' shell, 8 electron in 'L' shell and 1 electron in 'M' shell.  The distribution of electron in the shells is governed by the formula i.e. 2n2. Where 'n' represents the number of shells. The first shell is represented as 'K', second shell as 'L', third shell as 'M', and fourth shell as 'N' and so on.

• There for, as per the formula above,   the 'K' shell  i.e. 1st  shell will contain  2 x 12   =2 electrons and 'L' shell will contain 2 x 22 = 8 electrons.Which means it has completely filled 'K' and 'L' shells.

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