3. Is seawater an element, compound, or mixture? Explain your answer.

4. Explain the relationship between an atom and a molecule.

Seawater is a mixture because it contains more than one element, meaning that it cannot be one element. It is not a compound because it is not composed of a fixed ratio of elements, and not all elements in it are chemically bonded to each other. Also, components of a mixture can be separated via methods of physical separation, and this is true for sea water. Hence, it is a mixture

An atom is a single basic unit of any matter. A molecule consists of two or more atoms bonded to each other chemically in a fixed ratio