| Back | As you descend group 7, electronegativity decreases.- increase in sheilding- distance of outer e- from nucleus increases- reduces electrostatic forces of attraction between themHow reactive the element is depends on whether the reaction is causing reduction or oxidation in the halogen.Reduction of group 7 elements decreases down the group. (Reasons analogous to electro-vitiy). Therefore, oxidation of group 7 increases down the group.As few elements, are as electro-ve as group 7 elements, we can predict group 7 atoms are reduced when making compounds.Cl gas due to increasing number of electrons, stronger londonBr liquid forces, greater melting and boiling points.I solid (at standard temperature and pressure.) |