Which of the following best illustrates a natural process acting as a constructive force? A.
A river eroding soil during a flood.
B.
A glacier weathering a mountainside.
C.
Wind depositing sand to build up sand dunes.
D.
Acid rain breaking down the surface of a rock.

Ametal with a large number of free flowing electrons most likely has good conductivity

It is a mixture. simply put, a compound must be pure, that is, of only one chemical structure and composition. a mixture is made of different chemical substances (i.e. elements, molecules, compounds) that are not chemically bonded to each other, but instead physically grouped together, as in the case of gasoline (a homogeneous solution).