Question

group 7 elements are strong non metals,while group 1 elements are strong metals

Answer 1

Group 7 elements are strong because we go up to down metallic property increases

Answer 2

Answer:

Since, group 7 elements have 7 valance eletrons they can easily attract one electron and become stable and hence, they are known as strong non metals . On the other hand, Group I elements have only one valance electron they can easily donate an electron to become stable so they are known as strong metals.