When two solid objects are sliding past one another, the force that opposes this motion is . When two objects are not moving relative to one another but are still in contact, the force that resists the initiation of a sliding motion is .

idk

explanation:

thats how its supposed to be

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.