Xenon is a noble gas so it doesn't bond, but radium bonds pretty well
Xenon is the only noble gas that bonds with a other element.
The bond angle in xenon hexafluoride (XeF6) is approximately 90 degrees due to its distorted octahedral geometry.
I don't know about radon, but xenon gas, also a noble gas, is an anion when it makes compounds, as rarely as it does.
Mostly covalent bonds.
Radium oxide has never been characterised. As radium is group 2 metal with chemistry like barium, radium oxide is expected to be ionic.
Xenon can form a compound with fluorine by sharing electrons to create a covalent bond. Xenon has the ability to expand its valence shell by accepting electron pairs from fluorine atoms, allowing them to form a stable compound. This results in xenon difluoride (XeF2), where each xenon atom is bonded to two fluorine atoms.
Xenon is a noble gas in with the electrone of outermost orbit are balanced than the xenon cannot make ionic bond with another element such as Oxygen because if it make an ionic bond than the electron of the outer most orbit are unstable therefore it make an covalent bond with oxygen to fill the outer most unbalance electron of oxygen by sharing electron to form (xenon oxide) (xenon dioxide) and also with floride to form (xenon difloride) etc.
The ionic compound formed between Ra (Radium) and S (Sulfur) would be RaS, which is called radium sulfide. Radium typically forms an ionic bond with sulfur by transferring one electron from radium to sulfur to achieve stability.
I don't think any element can easily , or even bond with Xenon. Xenon is a noble gas with enough electrons on the outermost shell, therefore it exist alone like other noble gas such as helium, argon in the same group: Group 0.
Xenon commonly combines with fluorine to form xenon tetrafluoride (XeF4) and xenon hexafluoride (XeF6), as well as oxygen to form xenon tetroxide (XeO4).
The molecular geometry of Xenon Tetrafluoride is square planar. Xenon has 4 bond pairs and 2 lone pairs, resulting in a square planar geometry.
Radium forms an ionic compound with oxygen known as radium oxide (RaO). In this compound, radium, a metal, donates electrons to oxygen, a nonmetal, resulting in the formation of an ionic bond between them. Radium oxide is a solid compound with high ionic character due to the large difference in electronegativity between radium and oxygen.
Solid xenon forms van der Waals bonds due to the weak attraction between its atoms. These bonds are formed by temporary dipoles that result from the unequal distribution of electrons around the xenon atoms.