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en.wikipedia.org/wiki/Electrical_resistivity_and_conductivity

Electrical conductivity of water samples is used as an indicator of how salt-free, ion-free, or impurity-free the sample is; the purer the water, the lower the conductivity (the higher the resistivity). Conductivity measurements in water are often reported as specific conductance, relative to the conductivity of pure water at 25 °C.

www.thoughtco.com/table-of-electrical-resistivity-conductivity-608499

Electrical conductivity is the reciprocal quantity of resistivity. Conductivity is a measure of how well a material conducts an electric current. Electric conductivity may be represented by the Greek letter σ (sigma), κ (kappa), or γ (gamma).

www.thebalance.com/electrical-conductivity-in-metals-2340117

Electrical conductivity in metals is a result of the movement of electrically charged particles. The atoms of metal elements are characterized by the presence of valence electrons, which are electrons in the outer shell of an atom that are free to move about. It is these 'free electrons' that allow metals to conduct an electric current.

sciencing.com/conductivity-copper-6307070.html

Copper is a reddish-gold, non-precious metal. It is considered the standard of electrical conductivity by which other non-precious metals and alloys are measured. Because of the conductivity of copper, it is used in numerous electrical applications. Copper is ductile, malleable and recyclable.

www.nde-ed.org/GeneralResources/MaterialProperties/ET/Conductivity_Copper.pdf

resistivity converted from conductivity C17000-TM08 (strip) 33-45 3.8E-8--5.2E-8 MHASM2 resistivity converted from conductivity C17000 as-cast (billet) 16-22 7.8E-8--1.1E-7 MHASM2 resistivity converted from conductivity Conductivity Conductivity and Resistivity Values for Copper & Alloys Compiled by the Collaboration for NDT Education

www.engineeringtoolbox.com/thermal-conductivity-d_429.html

Thermal conductivity is a material property that describes ability to conduct heat.Thermal conductivity can be defined as "the quantity of heat transmitted through a unit thickness of a material - in a direction normal to a surface of unit area - due to a unit temperature gradient under steady state conditions"

www.bluesea.com/resources/108/Electrical_Conductivity_of_Materials

Brass is only 28% as conductive as copper. Some bronzes are as low as 7% as conductive as copper! Copper is the standard by which electrical materials are rated and conductivity ratings are expressed as a relative measurement to copper. These ratings will frequently be expressed as "28 IACS".

en.wikipedia.org/wiki/List_of_thermal_conductivities

In heat transfer, the thermal conductivity of a substance, k, is an intensive property that indicates its ability to conduct heat. Thermal conductivity is often measured with laser flash analysis. Alternative measurements are also established. Mixtures may have variable thermal conductivities due to composition.

sciencing.com/aluminum-vs-copper-conductivity-5829267.html

The two metals are close on the scale of conductivity, with copper having the more desirable characteristic. The conductivity of copper is about 0.6 megamho/cm while that of aluminum is about 0.4 megamho/cm.

www.engineeringtoolbox.com/thermal-conductivity-metals-d_858.html

Thermal Conductivity - k - is the quantity of heat transmitted due to an unit temperature gradient, in unit time under steady conditions in a direction normal to a surface of the unit area. Thermal Conductivity - k - is used in the Fourier's equation. Calculate Conductive Heat Transfer ; Calculate Overall Heat Transfer Coefficient