When a charged particle is placed in an uniform electric field, in absence of all other forces, it will experience an acceleration in the direction of the field lines.
$F = ma$
$qE = ma$
$a = \frac{qE}{m}$
All laws of Kinematics can be applied to the motion of the charged particle.
Is a negatively charged particle which given charge is not of the charge as electrons or protons is an electron.
huh
yes you are right