Acids of noble gases Are there any other acids of noble gasses besides xenic acid? Why other ones seem to be very unstable (like perxenic), or completely unknown (acids of any other noble gases). Particularly are there fluoroxenic acids, for example $\ce{HXeF5}$?
Yes there is and it has a very simple structure and is the strongest acid known: HeH$^+$. You might find it interesting to know that HeH$^+$ is also most likely the first molecule to have formed after the Big Bang.