surrounded smallest particles central Neutrons tiny atoms lightweight core nucleus Matter neutral Atoms Protons
is
composed
by
particles
called
which
are
the
particles
of
any
element
consist
of
a
and
dense
which
is
called
that
is
made
up
of
:
-
(
positively
charged
particles
)
-
(
charged
particles
)
and
it
is
by
one
or
more
electrons
(
negatively
charged
)