A mixture is not well mixed. A.) Saturated
B.) Insoluble
C.) Homogeneous
D.) Heterogeneous

periodic trends is an atom that gets larger as the number of electronic shells increase, the radius of atoms increases as you go down a certain group in the periodic table of elements. in general, the size of an atom will decrease as you move from left to right of a certain period.

a corroding iron, if that's one of your choices

wher is the rest of the question