# The "size" of the atom in Rutherford's model is about 1.0 \times10^

The "size" of the atom in Rutherford's model is about .
(a) Determine the attractive electrostatic force between an electron and a proton separated by this distance.
(b) Determine (in eV) the electrostatic potential energy of the atom. (Assume the electron and proton are again separated by the distance stated above.)
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peterpan7117i
Part a)
Write the equation of electrostatic force
$F=k\frac{{q}^{2}}{{r}^{2}}$
$\text{Missing superscript or subscript argument}$

Hence, the attractive electrostatic force is
Part b)
Write the equation of electrostatic potential energy
$V=k\frac{{q}_{1}{q}_{2}}{r}$

$V=-2.304×{10}^{-18}×\left(\frac{1eV}{1.6×{10}^{-19}J}\right)$
$V=-14.3eV$

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