C-10-Q004mediumsingle_mcqThe magnitude of the charge of a proton is —a1.6×10−191.6 \times 10^{-19}1.6×10−19 Cb9×1099 \times 10^{9}9×109 Cc1.6×10191.6 \times 10^{19}1.6×1019 Cd9.11×10−319.11 \times 10^{-31}9.11×10−31 C