(B)Calculate Fermi energy of potassium from the following data
Density of potassium =0.86g/cm2
atomic wt.= $9.202
Mass of electron=9.1 x 10-28 g
planck's cor stant h = 6.62 x 10-2 erg - 5
1 eV = 1.602 x 10-12 erg
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