Answer
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Step 1:I'll solve this problem by explaining the nature of luster as a property.
Step 2:: Define Luster
Luster is the way a material reflects light from its surface, describing its appearance and shine. This characteristic helps us understand whether it's a physical or chemical property.
Step 3:: Classify Property Type
Luster is a physical property because: - It does not involve changing the chemical composition of the substance - It can be observed without altering the material's chemical structure - The property describes a visual characteristic related to light reflection - No chemical reaction or transformation occurs when observing luster
Step 4:: Compare with Chemical Properties
Chemical properties involve: - Changes in chemical composition - Formation of new substances - Chemical reactions - Transformation of molecular structure Luster does not meet these criteria, as it simply describes how light interacts with a surface.
Step 5:: Examples of Luster
- Metallic luster (shiny, reflective) - Dull luster - Silky luster - Pearly luster These are all observable characteristics without changing the substance's chemical identity.
Final Answer
Luster is a PHYSICAL property because it describes a material's appearance without changing its chemical composition.
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