What is the force between two balloons with a negative charge of 1.6 x 10^-10c if the balloons are 5.0 cm apart

F= (K *q1*q2)/r^2
F: Force (newtons)
K: Constant = 9 x10^9
q1: Charge 1, absolute value (coulombs)
q2: Charge 2, absolute value (coulombs)
r: radius from center of objects (meters)

F= (9x10^9)*(1.6x10^-10)(1.6x10^-10)/(0.05^...
F= 9216 x10-8 N

This is a repelling force due to having the same charge. Same charge will repel, different will attract

An atom's smaller negative particles are at a distance from the central positive particles, so the negative particles are easier to move.