Which best describes activation energy? the maximum amount of energy required to end a chemical reaction. the amount of energy absorbed in an endothermic reaction. the minimum amount of energy required to start a chemical reaction. or the amount of energy released in an exothermic reaction.

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.

im doing test rn im going with 2 but ill give answer if itss wrong,   : )