\(\Delta x =10^{-7} m\)

\(\because \Delta p \cdot \Delta x =\frac{ h }{4 \pi}\)

\(\therefore m \Delta V \Delta x =\frac{ h }{4 \pi}\)

\(\Rightarrow m \times 2.4 \times 10^{-26} \times 10^{-7}=\frac{6.626 \times 10^{-34}}{4 \times \pi}\)

\(m =\frac{6.626}{9.6 \times \pi} \times 10^{-1}\)

\(m =0.02198 \,kg\)

\(m =21.98 \,gm\)

nearest integer \(=22\)