It is the difference in position of the two particles.

The total number of nuclear particles is 222, so it might be called radon-222.

At times, light seems to go only in a straight line, as if it were made of particles.

Mass is just the number of particles that make us up.

They were more than simply a new species of particle.

On the scale of an individual particle, such is not the case.

Research in this area has produced a long list of particles.

There is only one type of particles moving with such speed.

The distance to this point is called the range of the particle.

No evidence of new particles was detected in the 2010 data.