Determining the density of Silicon

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SUMMARY

The density of silicon can be calculated using its atomic weight and lattice constant. With 8 atoms in a unit cell and a lattice constant of 5.43 Å (5.43 x 10^-8 cm), the density is determined to be 4.99 x 10^22 atoms/cm³. This calculation is straightforward and relies on the conversion of the lattice constant from angstroms to centimeters.

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Homework Statement


There are 8 atoms in a unit cell of Si. Silicon has an atomic weight of 28.09 and a lattice constant equal to 5.43 A. Determine the density of silicon/


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The Attempt at a Solution


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Figured it out.
5.43 is in angstroms, which is 10^-8 cm.
So density is atoms for cm^3

so 8/(5.43x10^-8)^3 = 4.99x10^22/cm^3

Simple as that.
 

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