posted by liz .
what is a one sentence that describes how subtatomic particles and atomic mass unit are realted?
The atomic mass unit is 1/12 the mass of carbon-12.
Subatomic particles have nothing to do with it. Some myths float around that says the mass of the proton or neutron is equal to one amu, but that is most wrong.
The exact question how are the following terms related -
subatomic particels and atomic mass unit.
The heading on the apge is review and reinforcement structure of an atom - the three main subtomic particles are the proton, the nuetron and the electron.
Bob Pursley has given you the correct definition of an atomic mass unit.
The atomic mass of a particular isotope is very close to an integer that equals the total number of protons and neutrons in the nucleus. There are differences between the actual value and an integer that are due to (1) variable amounts of "binding energy" that holds the nucleus together and (2) the small contribution of electrons to the atomic mass.