12. Which of the following statements about density is true?
a. Density depends on mass and volume.
b. Density is weight per unit volume.
c. Density is measured in milliliters.
d. Density is a chemical property.

Which statement is the best definition of an atom? a) anything that has mass and occupies space. b) the smallest particle that has the properties of an element. c) a substance that cannot be broken down chemically into simpler substances. eliminate d) the smallest unit of a substance that exhibits all of the properties characteristic of that substance.