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 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?

Answer 1

The answer is "The student investigated more physical properties than chemical properties of lead." C

Answer 2

Missing question:

A. The student investigated only the physical properties of lead.

B. The student investigated only the chemical properties of lead.

C. The student investigated more physical properties than chemical properties of lead.

D. The student investigated more chemical properties than physical properties of lead.

Answer is: C. The student investigated more physical properties than chemical properties of lead.

A chemical property is any of a substance properties that is obvious after chemical reaction.

Chemical reaction of lead in air: 2Pb + O₂ → 2PbO.

Color, density, melting point and electrical conductivity are physical property. Physical property can be observed and measured without any changes in molecular composition. The same substance is present before and after the change.