Particles with similar polarity (for example, two particles with positive charges or two particles with negative charges) will repel each other, while particles with opposite polarity will attract each other.
(two particles with positive charges or two particles with negative charges; will repel; each other) (particles with opposite polarity; will attract; each other)
two particles with positive charges or two particles with negative charges particles with opposite polarity
will repel will attract
each other
each other