How did Lavoisiers & Proust study of combustion lead to the Law of Conservation of Mass and Law of Definite Proportions? How did Lavoisiers & Proust study of combustion lead to the Law of Conservation of Mass and Law of Definite Proportions?

um i think it might be a car?

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.

i think it's letter a.