1. The problem statement, all variables and given/known data What is the magnitude of the electric force a hydrogen nucleus exerts on its only orbiting electron in the Bohr model? 3. The attempt at a solution Fe = kQq/r^2 Since there is one proton and one electron. Q and q are equal to each other: 1.6 x 10^-19. k = 9 x 10^9 and radius = 40 x 10^-19. All the values are given in the question. The answer is 10^-7 but I got 1.7 x 10^-7. Why did they completely disregard the 1.7 ?