Question

Why is the electronic configuration of sodium written as 2, 8, 1 and not 2, 9? Explain.

Answer 1

Answer:

because the second shell can hold only 8 elections

Answer 2

It is so because in second shell maximum number of electron can only be 8 thus remaining 1 electron enters into third shell .

If you are in senior high school:

In second shell S and P orbitals are present so total number of electron 8

Explanation:

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