a pencil "lead" is actually made of graphite. graphite is made exclusively of carbon atoms. which two terms best describes graphite? A. compound. B. mixture. C. pure substance. D. element

A & C.

Explanation:

cannot be an element, element = C (carbon), not graphite.

cannot be a mixture: graphite is only made out of carbon atoms.

It is a pure substance and a compound.

The answer is C, as it states it's made of ONLY carbon atoms, not any others.

The answer is also A, because Graphite is still considered a compound.

molecules are free to separate from each other and will take on the shape of the container. molecules move completely at random and high speeds. they vibrate in a fixed position and do not move around much. molecules expand to the edge of their container.