* Chemical properties describe how a substance reacts with other substances or how it changes its chemical composition.

* Physical properties are characteristics that can be observed or measured without changing the substance's chemical makeup.

Sodium chloride is a compound formed by the chemical reaction of sodium (Na) and chlorine (Cl). Its existence as a compound is a result of a chemical change.

Here's a breakdown:

* Chemical property: The formation of sodium chloride from sodium and chlorine is a chemical change, and the properties of sodium chloride are distinct from its constituent elements.

* Physical property: You can observe the physical properties of sodium chloride, such as its white color, crystalline structure, and melting point, without altering its chemical composition.

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