Question

Within
the
nucleus
of
an
atom
each
proton
and
neutron
have
approximately
the
same
mass

Answer 1

Yes, within the nucleus of an atom, protons and neutrons have approximately the same mass. The mass of a proton is about 1.007276 atomic mass units (amu), while the mass of a neutron is about 1.008665 amu. Although their masses are very close, neutrons are slightly heavier than protons. For most practical purposes, they can be considered to have nearly identical mass, which is roughly 1 amu. This similarity in mass is important for the stability of atomic nuclei and for the processes that govern nuclear interactions.