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(a) Sodium metal crystallizes in a BCC s...

 (a) Sodium metal crystallizes in a BCC structure. Its unit cell edge length is 420p. Calculate its density. (atomic mass of sodium = `23u, N-6.022 xx 10^(23)(mol^(1-))..`

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`Density=(ZM)/(a^(3)N_(a))=(2xx23xx10^(-3))/(420xx10-12xx6.022xx10^(23))=3.73kgm^(-3)`
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