Here's how the properties of noble gases change as you go down the group:
* Atomic size increases: As you move down the group, the number of electron shells increases, leading to larger atomic radii.
* Boiling point increases: The larger the atom, the stronger the London dispersion forces between them, resulting in higher boiling points.
* Density increases: Larger atoms have more mass packed into a larger volume, leading to increased density.
* Reactivity generally decreases: The noble gases are already very unreactive due to their full outer electron shells. This trend continues down the group, making the heavier noble gases even less reactive.
It's important to note that even though the reactivity of noble gases is very low, they can still participate in chemical reactions under extreme conditions. For example, xenon can form compounds with fluorine and oxygen.
Summary:
As you move down group 0 (noble gases):
* Atoms become larger
* Boiling points increase
* Density increases
* Reactivity generally decreases
