To determine which statement is true regarding the student's investigation of lead properties, we will first classify each recorded property as either a physical property or a chemical property:
1. Color (dull gray): This is a physical property because it describes the appearance of lead without changing its chemical composition.
2. Density ([tex]$11.3 g/cm³$[/tex]): This is a physical property as it quantifies the mass per unit volume of lead without involving any chemical change.
3. Volume of sample ([tex]$3.00 cm³$[/tex]): This is a physical property since it is merely a measurement of the space occupied by the sample of lead.
4. Melting point ([tex]$327°C$[/tex]): This is a physical property because it is the temperature at which lead changes from solid to liquid, which is a physical change.
5. Reaction with air (lead oxide forms on the surface): This is a chemical property because it describes how lead interacts with air chemically to form lead oxide, changing its chemical composition.
6. Electrical conductivity (conducts some electricity): This is a physical property as it describes a material's ability to conduct electricity without changing its chemical composition.
We've identified the properties' types as follows:
- Physical properties: color, density, volume of sample, melting point, electrical conductivity.
- Chemical property: reaction with air.
Counting the properties, we have:
- Physical properties: 5
- Chemical properties: 1
Thus, the student investigated more physical properties than chemical properties.
The correct statement is: "The student investigated more physical properties than chemical properties of lead."
