Thermal conductivity is a property describing the material's ability to conduct heat and is not dependent on the amount of material present.

Thermal conductivity is a physical property

Explanation:

Physical property is a term linked to matter and is characterized as the private property of a body. This particular property can be measured and observed, as long as it does not compromise the composition of this body, that is, it does not compromise the matter.

Thermal conductivity is a physical property, as well as mass, color, melting and boiling point, among others.