Questions: Which of these is an example of a chemical property? Sodium chloride has a cubic crystal structure. Fireworks are explosions of black powder. Gold is a malleable and ductile metal. The melting point of iron is 1538°C.

Solution Steps

We need to determine which of the given properties is a chemical property. A chemical property describes a substance's ability to undergo a specific chemical change.

1. Sodium chloride has a cubic crystal structure.

   • This describes a physical property related to the arrangement of atoms in the solid state.

2. Fireworks are explosions of black powder.

   • This describes a chemical property because it involves a chemical reaction (combustion) that results in an explosion.

3. Gold is a malleable and ductile metal.

   • This describes physical properties related to the ability of gold to be shaped and stretched.

4. The melting point of iron is $1538^{\circ} \mathrm{C}$.

   • This describes a physical property related to the temperature at which iron changes from solid to liquid.

Final Answer