A proton and an electron are separated by 6.5 Ã 10â10 m. (a) calculate the magnitude of the electric force that the proton exerts on the electron

Couloumb's law : (1 / (4*pi*epsilon_nought)) * ((q_1*q_2) / r^2)

8.99*10^9 * ((charge of a proton*charge of an electron) / (6.5*10^10m) ^2)

8.99*10^9 * ((1.602*10^-19) (|-1.602*10^-19|) / ((6.5*10^10) ^2)

=5.4608*10^-50