  In the previous works the significance of the symmetric and non-symmetric
ion-atom absorption processes in far UV and EUV regions within a model of the
quiet Sun atmosphere, has been studied. The considered processes were the
processes of the photo-dissociation of the molecular ions H$_{2}^{+}$ and
H$X^{+}$ and absorption processes in H+H$^{+}$ and H$+X^{+}$ collisions, where
$X$ denotes the metal atom. As the continuation of the previous investigation,
these processes are considered also within the corresponding sunspot model. In
this work the non-symmetric ion-atom absorption processes are considered with
$X=$ Mg, Si, etc. It was analyzed the significance of such processes in far UV
and EUV regions in comparison with the concurrent absorption processes,
especially with the processes of the photo-ionization of the metal atoms (Na,
Mg, Ca, etc.) which were not included in the consideration in the case of the
quiet Sun atmosphere. From our analysis it follows that the non-symmetric
ion-atom absorption processes considered here, are significant not only for
quiet Sun modeling but also for sunspots and should be included {\it ab initio}
in both cases.
