Dissociation is when a single particle becomes two or more.

No single particle made a perceptible difference to the ring.

Some try to identify single physical particles with simple bits.

Miss Nugent, if you could stand still for one single particle of a second.

A difference between matter and mass therefore may seem to arise when single particles are examined.

So, for example, a single particle in a Universe with no other bodies would have zero mass.

With no outside information, a single particle is completely like any other.

Everything very small (single particles, individual atoms) is always changing.

There was not a single particle of growing stuff anywhere.

They began by stating how a single particle grows in a solution.