The noun form of the adjective "conductive" is "conductivity." Conductivity refers to the ability of a material to conduct electricity, heat, or sound. It is a measure of how easily electric charges or heat energy can move through a substance. For example, metals like copper and silver have high electrical conductivity, while materials like rubber or glass have low conductivity.

In scientific and engineering contexts, conductivity is a crucial property used to describe and analyze materials. It is often quantified in terms of specific measurements, such as electrical conductivity (measured in siemens per meter, S/m) or thermal conductivity (measured in watts per meter-kelvin, W/m·K).

Conductivity is a fundamental concept in fields like physics, materials science, and electrical engineering, where understanding how materials transmit energy is essential for designing and optimizing systems and devices.