To determine the correct statement with respect to the investigation, we need to classify each of the properties listed as either physical or chemical properties.
1. Color: This is a physical property. It describes the appearance of the lead without changing its chemical composition.
2. Density: This is a physical property. Density is a measurement that does not involve altering the substance itself.
3. Volume of sample: This is a physical property. It represents the space occupied by the lead, again without changing its chemical structure.
4. Melting point: This is a physical property. It is a characteristic that describes the temperature at which lead changes from solid to liquid, without changing its chemical composition.
5. Reaction with air: This is a chemical property. When lead reacts with air to form lead oxide, its chemical composition is altered.
6. Electrical conductivity: This is a physical property. It describes the ability of lead to conduct electricity, which does not change the chemical identity of the lead.
Let's count the physical properties:
- Color
- Density
- Volume of sample
- Melting point
- Electrical conductivity
There are 5 physical properties.
Now, let's count the chemical properties:
- Reaction with air
There is 1 chemical property.
Since the student has investigated more physical properties (5) than chemical properties (1), the correct statement is:
"The student investigated more physical properties than chemical properties of lead."
