Occurs when one or more substances change to produce one or more different substances? 1.Chemical Property
2. Chemical Reaction
3.Physical Property
4.Bulk Quanities
5. Pure Substance.

2. Chemical Reaction

Explanation:

I am pretty sure that is the only possible answer, but don't be mad if I am wrong.

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.