3. drude model (14 points)
(a) calculate the number density of valence electrons in lithium, g...
3. drude model (14 points)
(a) calculate the number density of valence electrons in lithium, given that the mass density
is 530 kg=m3, the molar mass is 7 g=mol, and that lithium is monovalent (i. e., each atom
has one valence electron). (6 points)
i used n = n_{a}\left ( z_{v}\rho _{m}/m_{a}\right ) and got a value of 4.56 x 1028 m-3
(b) assuming that the mean free path of the electrons is 1 nm, calculate the conductivity
and the mobility of lithium at 295 k. (8 points)
i know i need to use: l = v_{o}\tau and v_{o} = \sqrt{3k_{b}t/m} the values for kb, tau and t are given. what value of m is used?
answer key says that vo = 1.16 x 105 m/s that's where i got stuck
you may need the following constants:
avogadro's number: na = 6.022 x 1023 boltzmann constant: kb = 1.38066 x 10-23 j/k
electron mass: m = 9.10953
Answers: 1
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