I can’t see the picture its too small
It will belong to the metals because metals bond with nonmetals like chlorine to form ionic compounds
The film which you called it is photographic film and it is strip like sheet and it's surface is clrear and transparent plastic which is coated on
two sided one side is with gelatin emulsion consists microscopic small light-sensor which is actually very sensitive in nature silver halides crystals. The size shape and other characters of the crystals gives the sensitivity,contrast of different colors combination ,and resolution of the films.
They may break bonds,form new compounds, new ions etc...
At the end of the reaction, the catalyst is UNCHANGED.
:)
