Let a triangle represent atoms of element A and a circle represent atoms of element B.

a. Draw an atomic-level view of a homogeneous mixture of elements A and B.

b. Draw an atomic view of the compound AB in a liquid state (molecules close together).

c. Draw an atomic view of the compound AB after it has undergone a physical change (such as evaporation).

d. Draw an atomic view of the compound after it has undergone a chemical change (such as decomposition of AB into A and B).