Question

A student investigated some properties of lead and recorded the findings in the table below.

Property
Observation
color dull gray
density 11.3 g/cm3
volume of sample 3.00 cm3
melting point 327°C
reaction with air lead oxide forms on the surface
electrical conductivity conducts some electricity

Which statement is true with respect to the investigation?
The student investigated only the physical properties of lead.
The student investigated only the chemical properties of lead.
The student investigated more physical properties than chemical properties of lead.
The student investigated more chemical properties than physical properties of lead.

Answer 1

The correct option is c.

The student investigated both physical and chemical properties of lead, with more physical properties like color, density, volume, melting point, and electrical conductivity being noted as opposed to one chemical property, which is the formation of lead oxide on the surface when reacting with air.

Step-by-step explanation:

The student has investigated both physical properties and chemical properties of lead. Here's how they are classified:

• Physical properties observed include: dull gray color, density of 11.3 g/cm3, volume of the sample as 3.00 cm3, and melting point of 327°C. These are properties that can be measured without changing the substance's composition.
• Chemical property noted is the reaction with air, forming lead oxide on the surface. This is a property describing the ability of lead to react and form a new substance.
• Lead's electrical conductivity is also a physical property, as it describes lead's ability to conduct electricity without undergoing any change in its composition.

Therefore, the statement that the student investigated more physical properties than chemical properties of lead is true.