Elements from group/column will ionically bond with halogens in a 1 to 1 ratio.

The elements that will ionically bond with halogens in a 1 is to 1 ratio are the metals in the group or column 1 in the periodic table. These are alkali metals or the s-block in the periodic table. One example is sodium chloride where sodium ionically bonds with chlorine in a 1 is to 1 ratio. 

Its a hope this

Its the second one nonmetals are moldable and easily shaped