Final answer:
Some physical properties that can be used to determine whether a ring is made of gold include density and malleability. Color and boiling point are not reliable indicators of gold.
Step-by-step explanation:
When determining whether a ring is actually made of gold, some physical properties can be used while others cannot. Physical properties such as density and malleability can be used to determine whether a ring is made of gold. Density is an intensive physical property that is specific to each substance, and gold has a higher density compared to most other metals. Malleability refers to the ability of a substance to be hammered into thin sheets, and gold is highly malleable. On the other hand, physical properties such as color and boiling point cannot be used to determine whether a ring is made of gold because these properties can vary among different substances.
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