1.6×10−19 J1.6 \times 10^{-19} \mathrm{~J}1.6×10−19 J
1.6×10−27 J1.6 \times 10^{-27} \mathrm{~J}1.6×10−27 J
1.6×1019 J1.6 \times 10^{19} \mathrm{~J}1.6×1019 J
1.6×10−31 J1.6 \times 10^{-31} \mathrm{~J}1.6×10−31 J
