Final answer:
Xenon reacts with fluorine due to its electronic configuration and chemical reactivity, while neon does not react because it has a complete outer electron shell.
Step-by-step explanation:
Xenon reacts with fluorine, whereas neon does not, due to the differences in their electronic configurations and chemical reactivity. Xenon has a full outer electron shell (8 valence electrons), making it more likely to form compounds by gaining or losing electrons. On the other hand, neon has a complete outer electron shell (8 valence electrons), making it chemically inert and non-reactive.