Summary:
- A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance.
- Physical properties of matter include color, hardness, malleability, solubility, electrical conductivity, density, melting points, and boiling points.
- The vast majority of elements are colorless, silver, or gray.
- Some elements do have distinctive colors: sulfur and chlorine are yellow, copper is (of course) copper-colored, and elemental bromine is red.