come on, chemistry is suppose to deal with fundanmental particles....
it was the atomic theory that creates chemistry... (alone with alchemy

)
its just that nowadays people figure out new fundanmnetal particles...
positive pion + negative pion = "pionium"
doesnt that sound like chemistry?
also, chemistry reaction means that new substances are form, while physical reaction is about change in state....
although particles "reactions" arent like those in chemical.... but the concepts are about the same...
and, nuclear chemistry is very similar to subatomic particle decay and reactions...