Question

How many energy levels are present in the 3s conduction band of a single crystal of sodium weighing 26.8 mg? (in power of ${10}^{20}$)(Round-off the answer)

Answer 1

The number of energy levels are present in the 3s conduction band of a single crystal of sodium weighing 26.8 mg are $\frac{Massing}{molarmassing/mol}\times avogadr{o}^{\prime }snumber=\frac{26.8}{1000\times 23}\times 6.023\times {10}^{23}=7.015\times {10}^{20}$