Niobium crystallizes in body centred cub...

Niobium crystallizes in body centred cubic structure. If its density is 8.55 g `cm^(-3)`, calculate the atomic radius of niobium. (Atomic mass of Nb = 93u , `N_A = 6.02 xx 10^(23) mol^(-1)`)

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`d=(z xxM)/(a^(3)xxN_(A))`

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