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OpenStudy (anonymous):

Any suggestions how to start this? :D Si has an atomic density of 5_10^22 atoms/cm^3 this problem assume they are packed in a simple cubic-lattice (not diamond lattice) with 5*10^19 As atoms/cm^3 uniformly distributed. What is the average spacing between Si atoms, how many atoms would lie on the outermost layer, what would be the average spacing between As atoms?

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