Question

7 which of these is not a physical property of matter? select all that apply. a luster b reactivity c hardness d flammability e mass f density

Explanation:

• Physical property: A characteristic of a substance that can be observed or measured without changing the substance's chemical composition.
• Luster: How shiny a substance is. It can be observed without changing the substance's chemical makeup.
• Hardness: A measure of how resistant a material is to deformation. Observed without chemical change.
• Mass: The amount of matter in an object. Measured without chemical change.
• Density: Mass per unit volume. Calculated from mass and volume (physical measurements), no chemical change.
• Reactivity: A substance's ability to undergo a chemical reaction. It involves a chemical change.
• Flammability: A substance's ability to burn (undergo a chemical reaction with oxygen). Involves chemical change.

Answer:

B. reactivity, D. flammability