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Usman m u

Mar 9, 2015

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?

Answers(1)

Answer

Swathi Ambati

To know its position in periodic table first we should know the electronic configuration of the element.
For example Oxygen.
Atomic number of Oxygen is 16
Electronic configuration of oxygen - 2 8 6.
Valence electrons:  The electrons, which are present in the outermost shell of an atom are called valence electrons.
For any element number of valence electrons is equal to its group number. Here oxygen contains 6 valence electrons hence, it belongs to VI A group.
For any element the valence shell number  is equal to its period number.
In oxygen 3rd shell is the outermost shell (Valence shell) hence, it belongs to period 3.

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