Ok so my question is as follows: Can Maxwell Boltzmann statistics be used to describe electrons in a metal at room temperature? I know that the Fermi Temperature in metals is about 10^4 K or something rather high, so does that mean that the metal / electron gas would need to be at a temperature of over 10^4K to be described by MB Statistics? So at room temp of about 300k What about if the electrons were all replaced with something much heavier, say muons (approx 200x mass). What would you use then? My understanding is quantum gases occur at low temperatures / high densities (when the concentration is higher than the quantum concentration?) so does that mean the fermi temperature would be higher?