How does the electronic configuration of an atom relate to its position in the modern periodic table?

How does the electronic configuration of an atom relate to its position in the

modern periodic table?
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1 Answer

Answer :

The group number of elements having up to two valence electrons is equal to the number

of valence electrons.

For example:

Group 1 elements have 1 valence electron.

Group 2 elements have 2 valence electrons.

Group 13 elements have 3 valence electrons.
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