Do traditional particles occupy space

[rootone]

For example should a neutron be considered as a point, or does it have volume?

 

[HAYAO]

If treated as classical particles, then I believe they are considered as point particles.

 

[Lord Jestocost]

Have a look at https://www.physicsforums.com/threads/size-of-a-neutron.228633/

 

[Drakkith]

For example should a neutron be considered as a point, or does it have volume?

Neutrons are composite particles, not elementary particles, and thus would have a non-zero size. An electron, being an elementary particle, is point-like. It has zero size.