According to the kinetic molecular theory, which statement describes an ideal gas?
(1) the gas particles are diatomic
(2) energy is created when the gas particles collide
(3) there are no attractive forces between the gas particles
(4) the distance between the gas particles is small, compared to their size.

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.