The Periodic Table of Elements

 

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Electron Configurations and the Periodic Table

The periodic table is structured so that elements with the same type of valence electron configuration are arranged in columns.



The left-most columns include the alkali metals and the alkaline earth metals. In these elements the valence s orbitals are being filled
On the right hand side, the right-most block of six elements are those in which the valence p orbitals are being filled
These two groups comprise the main-group elements
In the middle is a block of ten columns that contain transition metals. These are elements in which d orbitals are being filled
Below this group are two rows with 14 columns. These are commonly referred to the f-block metals. In these columns the f orbitals are being filled

 

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