\(n = .01\% \, of \,5 \times10^{21}\)
\(n = \frac{{5 \times {{10}^{21}} \times .01}}{{100}}\)\( = 5 \times {10^{21}} \times {10^{ - 4}}= 5 \times 10^{17}\)
\(Q = 5 \times 10^{17} \times 1.6 \times10^{-19}\)
\(= 8 \times10^{-2} = 0.08\ C\)
\(Q = + 0.08\ C\)