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orangeincup
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Homework Statement
Boron atoms at a concentration of 3.60E+16 atoms/cm3 are added to pure intrinsic silicon as a substitutional impurity. Assume that the boron atoms are distributed homogeneously through the silicon in a cubic array.
Enter the fraction, by weight, accounted for by impurity atoms in the lattice. To do this, you will need to remember that silicon has a diamond structure with a lattice constant of 5.43 angstroms
Homework Equations
8/(a)^3=volume density
The Attempt at a Solution
8/(a)^3=4.99*10^23
3.60*10^22+4.99*10^23/4.99*10^23 = .99