The noble gases are the elements found in group 18 on the periodic table. Some of the noble gases are helium, krypton, radon and neon. These gases are on the far right of the periodic table, due to their similar characteristics.
Group 18 of the periodic table is also referred to as group O. Some shared properties of these gases are that they are colorless, odorless and have a complete outer shell. Due to having a complete outer shell, the noble gases are stable and do not react readily with many other elements. Additionally, noble gases have low boiling points.
There are many practical uses and applications for noble gases. In the medical field, radon may be useful in very small amounts in radiotherapy. Similarly, helium has uses for inflating weather balloons, and arc welding can require argon. Lighted signs can utilize neon.