Homework Answers
d = ZM/Na^3
Z = 1 atom in simple cubic unit cell
M = 209
d = 9.2g/cm^3
d = ZM/Na^3
a^3 = ZM/Nd
= 1*209/(6.023*10^23*9.2)
a^3 = 3.78*10^-23cm^3
a = 0.34*10^-7cm
a = 3.4*10^-8cm
a = 2r
r = a/2
= 1.7*10^-8cm
= 170pm >>>>>answer
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