In view of the fact that at normal temperature and pressure, Xenon is a gas, the idea of its hardness makes little sense - if any.
At normal temperature and pressure, xenon is a gas and so not particularly hard!
Xenon Difluoride
Xenon Trioxide
Xenon- atoms Xenon tetrafluoride- molecules
Xenon forms xenon hexafluoride, XeF6
xenon is colourless
John Xenon
Xenon is a gas
xenon
No, xenon is inert.
No, neon is not xenon.
Xenon is a anion