Measurements on sodium have given the following data resistivity 4.7 * 10^-8 ohm m, Hall coefficient -2.5 * 10-10 m3 C-1, critical wavelength of transparency 210nmm and density 971 kgm-3.
Compute:
1) Explain the density of electrons
2) Explain the mobility
3) Explain the effective mass
4) Define the collision time
5) Define the number of electrons per atom available for conduction.
Electric conduction in sodium is caused by electrons. The number of atoms in a kg mole is 6.02*1026 as well as the atomic weight of sodium is 23.