Which of these is a chemical property of aluminum?Aluminum has a density of 2.70 g · cm−3Aluminum is silvery white in color.Aluminum is highly reactive.Aluminum is a soft metal.

A chemical property describes how a substance behaves in a chemical reaction, such as how readily it reacts with other substances. Aluminum’s high reactivity is therefore a chemical property. Density, color, and softness can be observed without changing aluminum into a different substance, so they are physical properties.

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