Two electrons in an atom are separated by 1.5 ✕ 10-10 m, the typical size of an atom. what is the electric force between them?

Given two electrons with charge of 1.5x10^-10 m

The electostatic force between them is determined by this formula:

F = kq1q2/r^2

where

k = 9x10^9

q1 = q2 = 1.5x10^-10

r = 2.82x10^-15

F = 9x10^9 * (1.5x10^-10) ^2 / 2.82x10^-15

= 71808.51