The diagrams below illustrate models of various chemical compounds.
DO
Doced

salt
carbon dioxide
water
The diagrams suggest that compounds must be
A
made up of tivo or more different chemical elements.
B made up of only one chemical element.
c. made up of buvo or more of the same chemical elements only
D. made up of oxygen and one other chemical element.

1 is the answer to this problem

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.