  Within a linear sigma model framework, possible mixing between two chiral
nonets (a two quark nonet, and a four quark nonet) below 2 GeV is studied.
Incorporating the U(1)$_A$ behavior of the underlying QCD, and working in the
isospin invariant limit, the mass spectra of the I=0, $I=1/2$ and I=1
pseudoscalars, and the $I=1/2$ scalars are studied, and estimates of their
quark content are presented. It is found, as expected, that the ordinary and
the excited pseudoscalars generally have much less two and four quark
admixtures compared to the respective scalars. As by-products, several
quantities such as the four quark vacuum condensate, and the decay constant of
excited states are predicted.
