Question

Two elements a and b have atomic number 9 and 11 respectively .Explain this using a diagram

Answer 1

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electronic confrugation

Fluorine = atomic number 9 = 2, 7

sodium = atomic number 11 = 2 , 8 .

Answer 2

$\huge \mathbb\fcolorbox{black}{seashell}{Answer♡}$

electronic confrugation

Fluorine = atomic number 9 = 2, 7

sodium = atomic number 11 = 2 , 8 .