To determine which statement is true with respect to the investigation, we must first classify the properties into physical and chemical categories.
1. Color (dull gray) - This is a physical property.
2. Density ([tex]$11.3 g/cm^3$[/tex]) - This is a physical property.
3. Volume of sample ([tex]$3.00 cm^3$[/tex]) - This is a physical property.
4. Melting point ([tex]$327^\circ C$[/tex]) - This is a physical property.
5. Reaction with air (lead oxide forms on the surface) - This is a chemical property.
6. Electrical conductivity (conducts some electricity) - This is a physical property.
Now, let's count the number of physical properties and chemical properties:
- Physical properties:
- Color
- Density
- Volume of sample
- Melting point
- Electrical conductivity
Total number of physical properties: 5
- Chemical properties:
- Reaction with air
Total number of chemical properties: 1
Based on the counts:
- The student investigated 5 physical properties.
- The student investigated 1 chemical property.
The statements given are:
1. The student investigated only the physical properties of lead.
2. The student investigated only the chemical properties of lead.
3. The student investigated more physical properties than chemical properties of lead.
4. The student investigated more chemical properties than physical properties of lead.
Since the student investigated more physical properties (5) than chemical properties (1), the true statement is:
The student investigated more physical properties than chemical properties of lead.
