is it possible to combine all elements together with carbon chains? if not, please state why. i know this is a dumb quetion. i am sorry. but i was just curious.

Elements in the periodic table? Undoubtedly; every metal will bond with a carbonate ion and everyone knows how non-metals bond with carbon anyway. Do you want longer carbon chains? If so, then I'm sure they could; they already have tetraethyl lead, hemoglobin, various cobalt compounds, chlorophyll, etc.

it wouldn't just be a process of whacking on metal atoms onto a straight chain, you would have to pull some fancy chemistry to satisfy a metal atoms cavalence and electronegativity. some, may not bond in the conventional sense at all, and will have to be bound in macrocycles. others like iron may demand an aromatic pi system as in ferrocene.

If you had a multi-branched carbon chain molecule with each branch dealing with its own problem of bonding to an element through straight covalent bonding, macrocyclic bonding, or forming metallocene-like complexes;
And you disregarded the crazy unstable elements like francium;
And you allowed the trapping of the lighter noble gasses in fullerene cages...

Then no, the molecule would probably crap out on you during synthesis and form a number of smaller, more stable molecules rather than one you were aiming for.

Would you allow trapping an atom of every stable element in a giant fullerene cage?? That could work...