What are chemical properties of matter?

Chemical properties of matter refer to characteristics that become evident during a chemical reaction, meaning they can only be observed when a substance undergoes a transformation into a different substance. These properties indicate how a material interacts with other substances and can include traits such as reactivity with acids, bases, or other materials, flammability, and the ability to oxidize. For example, the rusting of iron is a chemical property that can only be observed when iron reacts with oxygen and moisture, resulting in a new substance, iron oxide.

The other options point to different types of properties related to matter. For instance, the first option describes physical properties, which can be observed without altering the chemical identity of the substance. The second option also pertains to physical attributes, such as color, boiling point, and state (solid, liquid, gas). Lastly, the fourth option relates to physical state and temperature, which further influences how matter can change physically but does not capture the essence of chemical reactions.