How does each column of the periodic table relate to electron configuration?

Md Ariful Islam

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Md Ariful Islam

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$"For main group elements, the column, the Group number"$$"........represents the number of valence electrons."$

Hydrogen is in $"Group I"$, and has the one valence electron. Chlorine is in $"Group VII"$, and has SEVEN .

The $"Group number"$ also represents the maximum oxidation number that the element can attain. To take chlorine again, this element can exhibit a $+VII$ oxidation state, i.e. in $ClO_4^-$, and cannot be further oxidized.

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