> periodicity of valence or oxidation states.
> Anomalous properties of seacond element:
> periodic trends and chemical reactivity:
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Anomalous properties of second period elements
Some elements on the 2nd period shows similarities with the elements of the 3rd period present diagonally to each other, though belonging to different group. Similarities in properties of the elements placed diagonally to each other is called diagonal relationship.
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