$${\Delta x = \frac{\hbar}{\Delta p_x} = \frac{(6,63 \times 10^{-34}\, \mathrm{J \cdot s})/2 \pi}{9,35 \times 10^{-27}\, \mathrm{kg \cdot m/s}} \\ = 1,13 \times 10^{-8}\, \mathrm{m} \approx \underline{\underline{11\, \mathrm{nm}}}}$$