An element from group 2 on the periodic table will bond ionically with elements from group 17 (7A).

a) Choose an element from each of these groups and write the chemical formula for the compound they create.

b) Explain how the ionic bond is created between these two elements.

The answer to your question is below

Explanation:

a) I will choose three elements of each group

   Group IIA              Group VIIA            Formula

        Mg         +                F                       MgF₂            

        Ca          +                Cl                      CaCl₂

        Sr           +                 Br                      SrBr₂

b) Elements in group IIA have 2 electrons in their outermost shell so they can donate these electrons of group VII A which have seven electrons in their outermost shell. So it is necessary 2 elements of group VII A, each atoms accepts one electron.

in chemistry, adhesion and cohesion are attractive forces that exist between molecules. they hold the molecules together from each other. they are different in that adhesive force exists between molecules of different substance while cohesive force happens between molecules of same substance.

adhesion between water and glass causes water molecules at the edge of water and glass interface to climb up the wall in a narrow glass tube. this is called capillary action. cohesion is what gives glass its shape and causes water to form a droplet.

i'm wiling to try and you : )