To determine the correct statement regarding the student's investigation, let's categorize each of the listed properties as either physical or chemical:
1. Color (dull gray) - This is a physical property because it describes the appearance of lead without changing its composition.
2. Density (11.3 g/cm³) - This is a physical property that indicates how much mass is in a given volume of lead.
3. Volume of sample (3.00 cm³) - This is a physical property as it measures the extent of space the lead sample occupies.
4. Melting point (327°C) - This is a physical property because it describes the temperature at which lead changes state from solid to liquid without altering its chemical structure.
5. Reaction with air (lead oxide forms on the surface) - This is a chemical property as it describes how lead reacts with another substance (oxygen in the air) to form a new compound (lead oxide).
6. Electrical conductivity (conducts some electricity) - This is a physical property because it describes how well lead allows the flow of electric current without changing its substance.
Next, we count the number of physical and chemical properties recorded:
- Physical properties: 5 (color, density, volume of sample, melting point, electrical conductivity)
- Chemical properties: 1 (reaction with air)
Since the student investigated 5 physical properties and only 1 chemical property, we conclude that:
The student investigated more physical properties than chemical properties of lead.
