Question

Number of free electrons from germanium as a function of temperature

Answer 1

Uernium is one type of radioactive material and it's spontaneous release the energy in own around and its create the high temperature.

Because of no. of free Electrons= U
A=238( mass no.)

Z=92( Atomic no.)
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Answer 2

Each has four valence electrons, but germanium will at a given temperature have more free electrons and a higher conductivity. Silicon is by far the more widely used semiconductor for electronics, partly because it can be used at much higher temperatures than germanium.