1. The problem statement, all variables and given/known data A beryllium nucleus is accelerated over a voltage drop of 200 V. Calculate the speed of the particle as it leaves the accelerator. 2. Relevant equations Electric field strength in a capacitor? (E=U/d). Working force in an electric field? (F=q*E) 3. The attempt at a solution I tried fitting this problem into electric field theory, but that requires the particle to have a charge - else it should not be influenced. The only property of a beryllium nucleus I know is its mass. I did a quick estimation of 1.4966*10^-23 grams (dividing it's atomic weight by one mole). How can I proceed with this problem?