Dichlorine heptaoxide, cl2o7, can be viewed as two clo4 groups sharing an o atom. draw a lewis structure for cl2o7 with the lowest formal charges and predict any deviation from the ideal for the cl―o―cl bond angle. be sure to include lone-pair electrons.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.