An electrons acceleration. Please check my answer!! Multiple-Concept Example 3 provides some pertinent background for this problem. Suppose a single electron orbits about a nucleus containing two protons (+2e), as would be the case for a helium atom from which one of the naturally occuring electrons is removed. The radius of the orbit is 3.09 x 10-11 m. Determine the magnitude of the electron's centripetal acceleration. Multiple-Concept Example 3 tells you that the electron mass is 9.11 x 10 ^ -31 kg. I know what I have to do... First, use Coulomb's law to find the Force. Then, divide by mass to find the acceleration. But the answer Im getting is HUGE. This is what I found.... F= 4.82 x 10 ^ 7 Then, a= 5.29 x 10 ^ 23. But, Im told that is the wrong answer. Please help!!