Question

What is maximum number of electrons that can be present in second last shell of potassium atom

Answer 1

The number of electrons in each shell in atomic structure is Ne=2n2
So, the 3rd shell can have a maximum number of electrons of 18.
That's why Sodium, Na is 2.8.1 and Magnesium, Mg is 2.8.2
Why isn't Potassium, K 2.8.9 but 2.8.8.1(a total of 4 shells)?

Answer 2

The max. no. of e- present in K atom is 8.

E.C. = 2,8,8,1
Second last shell have max. 8 e-.
If u understood then mark as brainlest.