# Resistivity of two copper wires using valence shell information

1. Apr 12, 2015

### rwooduk

1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution
From my thread in the Solid State section (and input from DrDu): The Thomas-Fermi wavevector relates to the damping of an electric field caused by build up of carriers around an impurity (screening). Where, $2\pi/k_0$ is the characteristic length over which a static perturbation is screened in a metal.

The trouble I'm having with this question is that I dont understand how to use the valance band shell information, please could someone explain to me how the information may be used to determine resistivity.

Thanks for any help.

2. Apr 17, 2015