The Periodic Table: Group 0

Group 0 elements, also known as noble gases, are the last group in the Periodic Table.
All noble gases have full outer shells, which means they are very stable and non-reactive.
Elements in this group include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).
Noble gases are all colourless, odourless, and tasteless.
Most of the noble gases are located in small quantities in the atmosphere, with argon being the most abundant.
These elements have low boiling points which increase as the atomic number increases. This is due to the increasing strength of the London forces between the atoms as their size increases.
Noble gases have very low reactivity due to their full electron shell. For this reason, they do not easily form compounds with other elements.
Noble gases are often used in situations where reactions are not wanted. For example, argon is used in lightbulbs to prevent the filament from burning; helium is used in balloons because it is lighter than air and does not react with anything else.
Radon, a radioactive noble gas, can be hazardous to health. It can seep into buildings from the ground and the risk is higher in certain geographical areas.
The structure of the Periodic Table, including Group 0, can be used to predict the properties of elements. For example, you should be able to predict that an undiscovered Group 0 element would be a gas at room temperature and would be unreactive.