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Sodium has a bc c structure with nearest...

Sodium has a `bc c` structure with nearest neighbour distance of `365.9` pm. Calculate its density. (Atomic mass of sodium `= 23`)

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For the bcc, structure, nearst neighbour distance (d) is related to the edge (a) as ` d= sqrt3/2 a`
or ` a= 2/sqrt3 d = 2 / 1.732 xx 365.9 = 422.5` pm.
For bcc stucture, Z =2
For sodium M= 23 , ` p = ( Z xx M)/ (a^(3) xx N_(0)) = (2xx23 "g mol"^(-1))/((422.5xx10^(-10) cm)^(3)xx(6.02xx 10^(23)"mol"^(-1)))= 1.51 "g/cm"^(3)`
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