How does electron configuration relate to the periodic table?

Md Ariful Islam

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Md Ariful Islam

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For simple explanation I will talk about only a representative element such as :
11Na : 1$s^2$ 2$s^2$ 2$p^6$ 3$s^1$
19K : 1$s^2$ 2$s^2$ 2$p^6$ 3$s^2$ 3$p^6$ 4$s^1$

you can see that Na and K was in the same group because their valance electron were in s orbital and only has 1 electron.
So if you do electron configuration with column 2 of periodic table you will also get 2 valance eleectrons in s orbital for Mg and Ca etc.

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