To determine which statement is true regarding the properties of lead that the student investigated, we need to classify each of the recorded properties as either physical or chemical and then compare their quantities.
Physical properties are those that can be observed or measured without changing the substance's chemical identity. They include:
- Color
- Density
- Volume of sample
- Melting point
- Electrical conductivity
Chemical properties involve the substance's ability to form new substances or react with others. Here, it includes:
- Reaction with air
Now, let's classify the properties from the table:
1. Color: Dull gray (Physical property)
2. Density: 11.3 g/cm³ (Physical property)
3. Volume of sample: 3.00 cm³ (Physical property)
4. Melting point: 327°C (Physical property)
5. Reaction with air: Lead oxide forms on the surface (Chemical property)
6. Electrical conductivity: Conducts some electricity (Physical property)
By listing these, we find:
- Physical properties investigated: Color, Density, Volume of sample, Melting point, Electrical conductivity (a total of 5 properties)
- Chemical properties investigated: Reaction with air (a total of 1 property)
Since the student investigated more physical properties (5) compared to chemical properties (1), the correct statement is:
The student investigated more physical properties of lead than chemical properties.
