The formula for the electric field is given by $E = \frac{kQ}{r^2}$, where $k$ is Coulomb's constant, $Q$ is the charge and $r$ is the distance. For an electron, $Q = -e$ and $r = 0.1 \, nm$. Substituting these values, we get:
\[E_{electron} = \frac{k(-e)}{(0.1
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