Periodic Table

Group A elements have a full outer shell of electrons, while Group B elements do not (correct)

Group A elements are metals, while Group B elements are non-metals

Group A elements have a higher atomic number than Group B elements

Group A elements have a lower electronegativity than Group B elements

Group B elements have a lower atomic mass than Group A elements

Group B elements are all gases, while Group A elements are all solids

Group B elements have variable valence electrons, while Group A elements have a fixed number of valence electrons (correct)

Group B elements have a higher reactivity than Group A elements

Group A elements tend to form ionic compounds, while Group B elements tend to form covalent compounds

Group A elements tend to have higher electronegativity than Group B elements (correct)

Group A elements tend to be more malleable and ductile than Group B elements

Group A elements tend to have lower melting and boiling points than Group B elements