Finding Electric Force between 2 parallel plates

[RobotUnicorn]

Homework Statement

An alpha particle is placed between two horizontal parallel charged plates that are 2.00 cm apart. The potential difference between the plates is 12.0 V.

WHAT is the ELECTRIC FORCE acting on the alpha particle?

-Mass of alpha particle: 6.65 x 10^-27 kg

Homework Equations

E = V/d
E = F/q

The Attempt at a Solution

E = V/d
= 12.0 / 0.02
= 600
...im really not sure where to go from here. It seems like the only way to get electric force is by knowing the charge of the particle, but that info isn't given. Is there some way to get around this?
any help is appreciated, thanks in advance

 

[gneill]

...im really not sure where to go from here. It seems like the only way to get electric force is by knowing the charge of the particle, but that info isn't given. Is there some way to get around this?
any help is appreciated, thanks in advance

An alpha particle consists of two protons and two neutrons...