5. Which of the following describes an element?
A. The simplest substance.
B. It can be broken down into other types of substances.
C. It can be separated through a chemical process.
D. It is composed of two or more types of atoms.

6. Which of the following statements correctly describes a compound?

|. It can be broken down into a simpler type of matter by chemical
means.
||. It has unique properties that are different from the properties of its
individual elements.
|||. It is composed of atoms of two or more elements that bond together
IV. It is composed of atoms of the same kind.
A. I. II. III. IV
B. I, II, III only
C. I, II, IV only
D. II, III, IV only​