How does electron configuration relate to the periodic table?

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How does electron configuration relate to the periodic table?

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Answer 1 · 2016-04-11T11:14:13

Electron configuration was used to group element with the same valance electron together. They also tend to have similar properties.

Explanation:

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

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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How does electron configuration relate to the periodic table?

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