6 \times 10^{-19} \, \text{C} \times 1.6 \times 10^{-19} \, \text{C}|}{5.3 \times 10^{-11} \, \text{m}} \]
\[ PE = \frac{9 \times 10^9 \times 2.56 \times 10^{-38}}{5.3 \times 10^{-11}} \]
\[ PE = \frac{2.304 \times 10^{-28}}{5.3 \times 10^{-11}} \]
\[ PE = -4.34
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