xenon is colourless
Under high pressure - around 150 gigaPascals - xenon turns metallic. In this phase it has a blue colour.
Xenon is generally colourless, however when electricity is passed, it gives out a lovely pale violet colour.
I guess the question is related to neon lamps rather than element neon. Neon lamps do use xenon gas it it. By varying the composition of gases used, the colour given out by the neon lamps can be changed.
When you mix fluorine with xenon, the fluorine can react with xenon to form xenon fluorides, such as xenon tetrafluoride (XeF4) or xenon hexafluoride (XeF6). These xenon fluorides are generally unstable and highly reactive compounds.
Xenon is a noble gas. I would think any compounds would be hard to make with using Xenon.
Xenon Difluoride
Xenon is a colourless gas. If you are referring to the light given out by HID Xenon bulbs, this is created by the electric arc generated inside the bulb. The colour of the arc can be altered by adjusting the mixture of chemicals in the gas. These are primarily various metal ions. Xenon gas is used because it is not only colourless, but is inert, meaning the high temperatures in the bulb will not cause it to react to any part of it. Xenon HID bulbs come in a range of colours from pure white through to purple. For use in cars, white or off-white is generally preferred, as these give the greatest light output. See: Xenon HID Bulb information as in the link below.
Xenon has a hexafluoride, which is xenon hexafluoride (XeF6). Argon does not have a stable hexafluoride compound.
Yes, xenon can form monatomic ions, known as xenon ions. Xenon can lose electrons to form positively charged xenon ions or gain electrons to form negatively charged xenon ions.
Xenon has 54 electrons.
Xenon Trioxide
In crystals of xenon, the species occupying the lattice points is xenon atoms. In xenon tetrafluoride crystals, the species occupying the lattice points is a combination of xenon atoms and fluorine atoms in a specific arrangement.