The ionic compound, MIx (where M is a metal) has a formula mass of 313 g/mol and a mass percent of iodine of 81.2%. What is the atomic mass of the element

what's the

there is none because earth is stationary and flat.

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.