1.6×1019C1.6\times 10^{19}\mathrm{C}1.6×1019C
1.67×10−27C1.67\times 10^{-27}\mathrm{C}1.67×10−27C
1.6×10−19C1.6\times 10^{-19}\mathrm{C}1.6×10−19C
1.67×10−23C1.67\times 10^{-23}\mathrm{C}1.67×10−23C
