a student attaches a rope to the handle of a chest loaded with a few books while the other end of the rope is tied to spring scale. The student repeats the experiment with more book in the chest and records the data in a table. What can concluded from the data?

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.