Question

which of these is an example of a physical property? tin has a density of 7.28 g/cm³. lead is toxic to the nervous system. candle wicks are flammable. nitric acid can dissolve steel.

Explanation:

A physical property is a characteristic of a substance that can be observed or measured without changing the substance's chemical identity. Density is a physical property as it can be measured without altering the substance (tin, in this case). Toxicity (lead's effect on the nervous system), flammability (candle wicks burning involves a chemical change), and the ability to dissolve steel (nitric acid reacting with steel is a chemical reaction) are chemical properties or involve chemical changes.

Answer:

A. Tin has a density of \( 7.28 \, \text{g/cm}^3 \).