a) [tex]D=\frac{m}{V}=\frac{55,85.1,67.10^{-24}}{\frac{4}{3}\pi R^{3}}=7,87[/tex]
=> R = [tex]1,414.10^{-8}[/tex] (cm)
b) Thực tế:
[tex]D=\frac{m}{V}=\frac{55,85.1,67.10^{-24}}{\frac{4}{3}\pi R^{3}.\frac{100}{75}}=7,87[/tex]
=> R(nguyên tử Fe) = [tex]1,28.10^{-8}[/tex] (cm)