Silicon has a face centered cubic crystal structure with, Ask an Expert

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Silicon has a face centered cubic crystal structure with unit cell edge length of 5.43 A and four atoms per unit cell A) How many silicon atoms are there in 1 cm3 of material? B) Suppose you dope that 1cm3 sample of silicon with 1ppm of phosphorus that will increase the conductivity by a factor of a million. How many milligrams of phosphorus are required?

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