Its behavior is described by quantum physics (4)
I believe the answer is:
atom
(Other definitions for atom that I've seen before include "Small particle of matter" , "Moat (anag.)" , "Part of molecule" , "Smallest amount" , "Bit of make-up" .)
I believe the answer is:
atom
(Other definitions for atom that I've seen before include "Small particle of matter" , "Moat (anag.)" , "Part of molecule" , "Smallest amount" , "Bit of make-up" .)