Answer:
Chemical Properties
Step-by-step explanation:
Elements belonging to same group in a periodic table have same chemical properties. This similarity in chemical properties arises mainly from the same number of valence shell electrons. Group 2 elements also called Alkaline Earth Metals have two valence electrons in their valence shell with following electronic configuration....
ns²
Where "n" represents principle quantum number or number of main shell.
The reactivity of these elements is due to the metallic behavior as these elements looses two electrons to form a cation with +2 oxidation number. i.e.
X → X⁺² + 2 e⁻
Therefore, all elements present on Group II will form a cation with +2 oxidation number and behave in the same manner with different reagents.